Title: 1 July 1968
Author: NHRA
Last saved by: p3800

Issued:        1 July 1968    
Revised:       4-17-70, 1-1-96, 2-24-96, 7-1-99      
Bulletin #:    BUI-68    Page 1 of 1

Specifications for the   1968 Buick engines.

H.P. Disp.     C.R. Ind. Make Model/Transmission             Manifold  R.R. Lifter	Head cc   Notes 

155  250       8.50 1-1  Roch MV-7034044/ALL                 N.A.      1.75 H	69.6       4,5
230  350       9.00 1-2  Roch 2GC-7028141/SM 7028140/AUTO    1382616   1.55 H	51.0       2         
280  350      10.25 1-4  Roch 4MV-7028244/SM 7028245/AUTO    1382615   1.55 H	51.0       3         
340  400      10.25 1-4  Roch 4MV-7028240/SM 7028242/AUTO    1383448   1.59 H	59.5       1,3       
360  430      10.25 1-4  Roch 4MV-7028243/AUTO ONLY          1383448   1.59 H	59.5       1,3       
                                                                                                                                   
Notes

 1    Alt Manifold - 1386681   		4   Carb Size – 1686/1313
 2    Carb sizes - 1686/1250			5   Alt Manifold  3859381
 3    Carb sizes - 1375x2250/1093xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome Ht/Vol			Valves    Cam Lift	Springs        Notes 

155  250	.011	   Dished    .065”   7.67 cc		1725/1505 388/388	Outer Only
230  350	.010      Dished    .235"			1880/1505 377/384	Outer Only
280  350	.010      Dished    .075"  17.3 cc's		1880/1505 377/384	Outer Only      A         
340  400	.020      Dished				2005/1630 419/449	Outer w Damper
360  430	.010      Dished				2005/1630 419/449	Outer w Damper                                                    

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".                                                                               

H.P. Disp.     Gasket		Head Cast 

155  250	 .032		3895050,3895054,3998180,331183,331184,3927763
230  350       .020		1382546
280  350       .020		1382546
340  400       .020		1384720,1382091,1231786
360  430       .020		1384720,1382091,1231786  

Issued:        1 March 1969   
Revised:       4-17-70, 1-1-96, 2-24-96, 7-1-99      
Bulletin #:    BUI-69    Page 1 of 1

Specifications for the   1969 Buick engines.

H.P. Disp.     C.R. Ind. Make Model/Transmission                Manifold  R.R. Lifter	Head cc	 Notes 
     
155  250	8.50 1-1  Roch MV-7029047/SM  7029014/AUTO       3923418   1.75 H		69.6       4
230  350       9.00 1-2  Roch 2GC-7029141/SM 7029140/AUTO       1386845   1.55 H		51.0       2         
280  350      10.25 1-4  Roch 4MV-7029245/SM 7029244/AUTO       1387069   1.55 H		51.0       3         
340  400      10.25 1-4  Roch 4MV-7029243/SM 7029242/AUTO       1386003   1.59 H		59.5       3         
350  400      10.25 1-4  Roch 4MV-7029243/SM 7029246/AUTO       1386003   1.59 H		59.5       3         
360  430      10.25 1-4  Roch 4MV-7029243/SM 7029241/AUTO       1386003   1.59 H		59.5       1,3       

Notes

1    Carb listed for automatic is for Riviera.  Wildcat & Electra w/auto uses 7029240.
2    Carb sizes - 1686/1250
3    Carb sizes - 1375x2250/1093xAV		4   Carb Sizes – 1686/1313

               Deck      Piston Type                                                                                               
H.P. Disp.      Cl     Dish/Dome Ht/Vol		Valves    Cam Lift       Springs        Notes 

155  250	.011	   Dished  .065”   7.67cc’s	1725/1505 388/388        Outer Only
230  350	.010      Dished  .235"		1880/1505 377/384        Outer Only
280  350	.010      Dished  .075"  17.3 cc's	1880/1505 377/384        Outer Only      A         
340  400	.020      Dished	   22.67cc's	2005/1630 419/448        Outer w Damper
350  400	.020      Dished	   22.67cc's	2005/1630 407/454        Outer w Damper
360  430	.010      Dished			2005/1630 419/448        Outer w Damper                                                    

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".

                     		Head
H.P. Disp.	Gasket		Cast

155  250	 .032		3895054,3998180,331183,331184,3927763
230  350       .020		1382546
280  350       .020		1382546
340  400       .020		1231109                 
350  400       .020		1231109                 
360  430       .020		1231109

Issued:        March 23, 1970
Revised:       5-24-71, 1-1-96, 2-24-96
Bulletin #:    BUI-70    Page 1 of 1
                                                                                                                                   
Specifications for the   1970 Buick engines

H.P. Disp.  C.R. Ind. Make Model/Transmission	      Manifold  R.R. Lifter	Head cc   Notes                        

260  350   9.00 1-2  Roch 2GV-7040143/SM 7040142/AUTO     1231381   1.55 H		48.0      1,3        
285  350   9.00 1-4  Roch 4MV-7040245/SM 7040244/AUTO     1231924   1.55 H		48.0      4          
315  350  10.25 1-4  Roch 4MV-7040245/SM 7040244/AUTO     1231924   1.55 H		48.0      4          
350  455  10.00 1-4  Roch 4MV-7040243/SM 7040240/AUTO     1231718   1.55 H		59.5      4          
360  455  10.50 1-4  Roch 4MV-7040246/ALL                 1231718   1.55 H		55.5      4          
370  455  10.00 1-4  Roch 4MV-7040243/SM 7040247/AUTO     1231718   1.55 H		59.5      2,4        

Notes

1    Alt carb - 7040446/AUTO
2    Riviera with auto uses 7040240.
3    Carb sizes - 1686/1250
4    Carb sizes - 1375x2250/1093xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome Ht/Vol 		Valves    Cam Lift       Springs        Notes     

260  350       .010      Dished    .235"		1880/1505 382/389        Outer Only
285  350       .010      Dished    .235"		1880/1505 377/384        Outer Only
315  350       .010      Dished    .075"  17.3 cc's	1880/1505 382/398        Outer Only     A          
350  455       .010      Dished    .020"  16.0 cc's	2005/1630 387/459        Outer Only
360  455       .010      Dished    .020"  16.0 cc's	2130/1755 490/490        Outer w Damper
370  455       .010      Dished			2005/1630 387/459        Outer Only

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".

                         Head
H.P. Disp.     Gasket    Cast

260  350	.020	1233472,1240143
285  350	.020	1233472,1240143
315  350	.020	1233472,1240143
350  455	.020	1231786,1240149
360  455	.020	1231786,1240149
370  455	.020	1231786,1240149

Issued:        May 24, 1971   
Revised:       1-1-96, 2-24-96            
Bulletin #:    BUI-71    Page 1 of 1

Specifications for the   1971 Buick engines

H.P. Disp.     C.R. Ind. Make Model/Transmission              Manifold  R.R. Lifter Head cc   Notes 

230  350      10.50 1-2  Roch 2GV-7041143/SM 7041142/AUTO     1236402   1.55 H	  50.0       1         
260  350      10.50 1-4  Roch 4MV-7041245/SM 7041544/AUTO     1236389   1.55 H	  50.0       2         
315  455      10.50 1-4  Roch 4MV-7041243/SM 7041540/AUTO     1236403   1.55 H	  59.0       2         
330  455      10.50 1-4  Roch 4MV-7041243/SM 7041540/AUTO     1236403   1.55 H	  59.0       2         
345  455      10.50 1-4  Roch 4MV-7041242/ALL                 1236403   1.55 H	  59.0       2         

Notes
1    Carb sizes - 1686/1250
2    carb sizes - 1375x2250/1218xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome       Ht/Vol	Valves    Cam Lift       Springs        Notes 

230  350       .010      Dished    .075" 17.3cc	1880/1505 392/408        Outer w Damper   A        
260  350       .010      Dished    .075" 17.3cc	1880/1505 392/408        Outer w Damper   A        
315  455       .010      Dished    .140" 28.7cc	2005/1630 398/466        Outer w Damper
330  455       .010      Dished    .140" 28.7cc	2130/1755 430/468        Outer w Damper
345  455       .010      Dished    .140" 28.7cc	2130/1755 490/490        Outer w Damper                                      

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".

H.P. Disp.     Gasket    Head Cast
230  350	.041	1237650,1240143
260  350	.041	1237650,1240143
315  455	.041	1237661,1240149
330  455	.041	1237661,1240149
345  455	.041	1237661,1240149

Issued:        Feb 25, 1972   
Revised:       1-1-96, 2-24-96, 10-02-01,2-21-03           
Bulletin #:    BUI-72    Page 1 of 1

Specifications for the   1972 Buick engines

H.P. Disp.  C.R. Ind. Make Model/Transmission               Manifold  R.R. Lifter	Head cc   Notes 

155  350   10.50 1-2  Roch 2GV-7042143/SM 7042142/AUTO	1238643   1.55 H	50.0      1,5,8      
195  350   10.50 1-4  Roch 4MV-7042244/SM 7042244/AUTO      1238647   1.55 H	50.0      2,6,9      
225  455   10.50 1-4  Roch 4MV-7042240,940 AUTO ONLY        1239925   1.55 H	59.0      7,10       
250  455   10.50 1-4  Roch 4MV-7042243/SM 7042240/AUTO      1239925   1.55 H	59.0      3,7,10     
260  455   10.50 1-4  Roch 4MV-7042240,940/AUTO ONLY        1239925   1.55 H	59.0      7,10       
270  455   10.50 1-4  Roch 4MV-7042243/SM 7042242/AUTO      1239925   1.55 H	59.0      4,7,10     

Notes:

1    Alt carb - 7042842/Auto
2    Alt carb - 7042245/SM, 7042944/Auto
3    Alt carb - 7042940/Auto
4    Alt carb - 7042942/Auto  Stage 1 engine
5    Alt manifold - 1238578
6    Alt manifold - 1238586
7    Alt manifold - 1238323
8    Carb sizes - 1686/1250
9    Carb sizes - 1375x2250/1093xAV
10   Carb sizes - 1375x2250/1218xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome      Ht/Vol		Valves    Cam Lift       Springs        Notes 
155  350       .010      Dished    .075" 17.3cc	1880/1505 392/408        Outer w Damper   A        
195  350       .010      Dished    .075" 17.3cc	1880/1505 392/408        Outer w Damper
225  455       .010      Dished    .140” 28.7cc     2005/ 1630 397/466        Outer w Damper 
250  455       .010      Dished    .140" 28.7cc	2005/1630 397/466        Outer w Damper
260  455       .010      Dished    .140" 28.7cc	2130/1755 430/468        Outer w Damper
270  455       .010      Dished    .140" 28.7cc	2130/1755 490/490        Outer w Damper

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".
                                                            
                         	    Head
H.P. Disp.     Gasket    	    Cast
155  350	.041		1238145,1242145,1242556  
195  350	.041		1238145,1242145,1242556                   
225  455	.041		1238148,1242445
250  455	.041		1238148,1242445                
260  455	.041		1238148,1242445                     
270  455	.041		1238148,1242445,1242455

Issued:        April 1, 1974   
Revised:       1-1-96, 2-24-96          
Bulletin #:    BUI-74    Page 1 of 1

Specifications for the   1974 Buick engines

H.P. Disp.     C.R. Ind. Make Model/Transmission     Manifold  R.R. Lifter         Head cc   Notes 

150  350      10.50 1-2  Roch 7044142/AUTO ONLY      1245062   1.55 H              50.0        1        
175  350      10.50 1-4  Roch 7044244/AUTO ONLY      1245060   1.55 H              50.0        2 
175  455      10.50 1-2  Roch 7044141/AUTO ONLY      1243815   1.55 H              59.0        1  
190  455      10.50 1-2  Roch 7044141/AUTO ONLY      1243815   1.55 H              59.0        1  
210  455      10.50 1-4  Roch 7044240/AUTO ONLY      1245061   1.55 H              59.0        3 
230  455      10.50 1-4  Roch 7044240/AUTO ONLY      1245061   1.55 H              59.0        3
245  455      10.50 1-4  Roch 7044540/AUTO ONLY      1245061   1.55 H              59.0        3 
255  455      10.50 1-4  Roch 7044242/AUTO ONLY      1245061   1.55 H              59.0        3

Notes
1    Carb sizes - 1686/1250
2    Carb sizes - 1375x2250/1093xAV
3    Carb sizes - 1375x2250/1218xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome Ht/Vol             Valves    Cam Lift       Springs        Notes 

150  350       .010      Dished    .075" 17.3cc     1880/1505 392/408        Outer w Damper   A
175  350       .010      Dished    .075" 17.3cc     1880/1505 392/408        Outer w Damper   A
175  455       .010      Dished    .140" 28.7cc     2005/1630 397/466        Outer w Damper
190  455       .010      Dished    .140" 28.7cc     2005/1630 397/466        Outer w Damper
210  455       .010      Dished    .140" 28.7cc     2005/1630 397/466        Outer w Damper
230  455       .010      Dished    .140" 28.7cc     2005/1630 397/466        Outer w Damper
245  455       .010      Dished    .140" 28.7cc     2130/1755 430/468        Outer w Damper
255  455       .010      Dished    .140" 28.7cc     2130/1755 490/490        Outer w Damper

A = If TRW L2343 or Sealed Power 2232P piston is used the 
    legal dish spec will change from .075" to .070".
                                                             
H.P. Disp.     Gasket    	Head Cast

150  350	.041		1241861,1243452          
175  350	.041		1241861,1243452                           
175  455	.041		1241860         
190  455	.041		1241860         
210  455	.041		1241860                        
230  455	.041		1241860                             
245  455	.041		1241860                             
255  455	.041		1241860

Issued:        Feb 28, 1975     
Revised:       6-13-75, 6-27-75, 4-2-76, 2-24-96, 2-20-97, 7-1-99, 5-24-01
Bulletin #:    BUI-75    Page 1 of 1

Specifications for the   1975 Buick engines

H.P. Disp.     C.R. Ind. Make Model/Transmission          Manifold  R.R. Lifter	Head cc   Notes 

105  250       9.21 1-1  Roch 7045017/SM     7045016		 352191  1.75 H	67.50       1,3
110  231       9.23 1-2  Roch 7045145/SM     7045148		1248470  1.53 H	42.70       2,6                   
110  260       9.20 1-2  Roch 7045297/SM			 550559  1.60 H	56.03       4
145  350       9.61 1-2  Roch 7045140,3/AUTO ONLY		1249167  1.55 H	50.00       6
165  350       9.61 1-4  Roch 7045244,6/AUTO ONLY		1249169  1.55 H	50.00       5
205  455      10.28 1-4  Roch 7045240,548/AUTO ONLY		1247331  1.55 H	73.00       5

Notes

1    Alt carb - 7045314/Auto
2    Alt carb - 7045157,7045447/SM  7045149,7045448,9/Auto
3    Carb sizes - 1686/1313
4    Carb sizes - 1375/1093
5    Carb sizes - 1375x2250/1218xAV
6    Carb sizes – 1686/1093
            Deck    Piston Type                   
H.P. Disp.  Cl    Dish/Dome Ht/Vol		Valves    Cam Lift       Springs        Notes 
105  250   .011   Dished    .077"   7.67cc	1725/1425 401/377        Outer Only
110  231   .035   Dished    .235"  23.50cc	1625/1425 401/377        Outer Only     1
110  260   .003   Flat				1527/1305 440/440        Outer Only
145  350   .010   Dished    .235"  23.50cc	1880/1555 392/408        Outer Only     1,A,B
165  350   .010   Dished    .235"  23.50cc	1880/1555 392/408        Outer Only     1,A,B
205  455   .010   Dished    .140"  14.70cc	2005/1692 397/413        Outer Only     1                         

A If TRW L2342 piston is used the legal dish depth spec will
  change from .235" to .230".
B PISTON DISH DEPTH ADJUSTMENTS- BADGER B422 .218 DEEP, ENGINE TECH P1504 & SILVOLITE 1746 .215 DEEP, BADGER P422A .210 DEEP, GM #25527180 .210 DEEP 

1    Exhaust valve springs have Outer w Damper 

H.P. Disp.     Gasket    	Head Cast                               

105  250       .032		355795,3997180,331183,331184
110  231       .021		1249175
110  260       .014		550362
145  350       .041		1243452
165  350       .041		1243452
205  455       .041		1246322

Issued:        March 15, 1976    
Revised:       2-24-96, 2-20-97, 5-24-01          
Bulletin #:    BUI-76    Page 1 of 1

Specifications for the   1976 Buick engines

H.P. Disp.     C.R. Ind. Make Model/Transmission              Manifold R.R. Lifter  Head cc   Notes 

105  231       9.23 1-2  Roch 17056145/SM    17056146/AUTO	  1248470   1.53 H	  42.70       1,4
110  260       9.20 1-2  Roch 170561457/SM   17056156/AUTO	   550559   1.60 H	  56.03       2,3
140  350       9.61 1-2  Roch 17056140,3/AUTO ONLY		  1249167   1.55 H	  50.00       4
155  350       9.61 1-4  Roch 17056244,246,544,546/AUTO ONLY  1249169   1.55 H	  50.00       5
205  455      10.28 1-4  Roch 17056240,540/AUTO ONLY		  1247331   1.55 H	  73.00       5
                                                                                                                          
Notes

1    Alt carb - 17056147/SM  17056148,9,446,8,9/Auto
2    Alt carb - 17056457/SM  17056158,455/Auto
3    Carb sizes - 1375/1093
4    Carb sizes - 1686/1093
5    Carb sizes - 1375x2250/1218xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome Ht/Vol                 Valves    Cam Lift       Springs        Notes 

105  231       .035      Dished    .235"     23.50cc    1625/1425 401/377        Outer Only     1
110  260       .003      Flat                           1527/1305 396/400        Outer Only
140  350       .010      Dished    .235"     23.50cc    1880/1555 329/344        Outer Only     1,A,B
155  350       .010      Dished    .235"     23.50cc    1880/1555 329/344        Outer Only     1,A,B
205  455       .010      Dished    .140"     14.70cc    2005/1692 397/413        Outer Only     1                        

A If TRW L2342 piston is used the legal dish depth spec will
  change from .235" to .230".
B PISTON DISH DEPTH ADJUSTMENTS- BADGER B422 .218 DEEP, ENGINE TECH P1504 & SILVOLITE 1746 .215 DEEP, BADGER P422A .210 DEEP, GM #25527180 .210 DEEP 

1    Exhaust valve springs have Outer w Damper 

                         Head
H.P. Disp.     Gasket    Cast

105  231       .021      1249175
110  260       .014      550362
140  350       .041      1243452
155  350       .041      1243452
205  455       .041      1246322

Issued:        June 24,1977     
Revised:       Sept 19,1988, Nov 21,1994, 1-5-96, 2-24-96, 5-23-96, 2-16-98, 4-2-01                                                
Bulletin #:    BUI-77    Page 1 of 1
Specifications for the   1977 Buick engines                                                                                     
                                                                                                                          
H.P. Disp. C.R. Ind. Make Model/Transmission		Manifold  R.R. Lifter	Head cc   Notes 
105  231   9.25 1-2  Roch 17057145,447		1257119   1.53 H	42.70     1,2,7   
135  301   9.52 1-2  Roch 7057173,7057172		 526213   1.50 H	69.90     3  
140  350   9.61 1-2  Roch 7056140,7056143		1249167   1.55 H	50.00     4 
145  305   9.24 1-2  Roch 17057107,17057111		 346260   1.50 H	59.10
155  350   9.61 1-4  Roch 17056246,17056546		1249169   1.55 H	50.00     5 
170  350   9.06 1-4  Roch 17057250,3,5,6,8,550,3	 411990   1.60 H	66.35     5 
170  350  10.21 1-4  Roch 17057202,502		 346249   1.50 H	63.35     6 
185  403   9.18 1-4  Roch 17057250,2,3,5,6,7,8,550	 411990   1.60 H	71.69     5 

1    Alt carb - 17057143,148,448 
2    Carb sizes - 1686/1093 
3    Carb sizes - 1375/1218
4    Carb sizes - 1686/1250
5    Carb sizes - 1375x2250/1218xAV
6    Carb sizes - 1375x2250/1093xAV
7    1257119 is EVEN FIRE MANIFOLD  1254143 is ODD FIRE MANIFOLD                                                                

               Deck    Piston Type                   
H.P. Disp.      Cl    Dish/Dome Ht/Vol              Valves    Cam Lift       Springs        Notes 
105  231	.035	Dished    .235"  23.5cc	1630/1430 401/401	Outer Only     8
135  301	.018AB	Flat				1720/1500 377/377	Outer Only
140  350	.010	Dished    .235"  23.5cc	1880/1555 329/344	Outer Only     8,A,B
145  305	.002	Dished    .107"  12.44cc	1725/1505 373/410	Outer w Damper
155  350	.010	Dished    .235"  23.5cc	1880/1555 329/344	Outer Only     8,A,B
170  350	.002	Dished    .131"  11.86cc	1880/1500 440/440	Outer w Damper       
170  350	.002	Dished    .064"   9.92cc	1945/1505 390/410	Outer w Damper
185  403	.002	Dished    .138"  16.98cc	2000/1500 440/440	Outer w Damper           
                                                                                                                          
A If TRW L 2342 piston is used the legal dish depth spec will
  change from .235" to .230".                                                                                          
B PISTON DISH DEPTH ADJUSTMENTS- BADGER B422 .218 DEEP, ENGINE TECH P1504 & SILVOLITE 1746 .215 DEEP, BADGER P422A .210 DEEP, GM #25527180 .210 DEEP 

8    Exhaust valve springs have Outer w Damper 

H.P. Disp.     Gasket Head Cast
105  231	.021	1254170 ODD FIRE  1257722 EVEN FIRE                                                               
135  301	.029	526211,526201              
140  350	.041	1243452
145  305	.020	354434,375450,462614
155  350	.041	1243452
170  350	.030	554716
170  350	.016	333882,376450
185  403	.030	554717

Issued:        Sept 25, 1979     
Revised:       Nov 21, 1994, 2-24-96, 2-16-98, 4-24-01, 5-7-01
Bulletin #:    BUI-78    Page 1 of 1
Specifications for the   1978 Buick engines                                                                                  

H.P. Disp.  C.R. Ind. Make Model/Transmission             Manifold  R.R. Lifter   Head cc   Notes 
 95  196    9.66 1-2  Roch 17058143/SM    17058144		1260280   1.55 H	42.70       1
105  231    9.32 1-2  Roch 17058145/SM    17058181/AUTO	1260280   1.55 H	42.70       2,9
140  301    9.52 1-2  Roch 17058160/AUTO/ONLY	      100000516   1.50 H	69.90
145  305    9.39 1-2  Roch 17058107/SM    17058108/AUTO	 373598   1.50 H	59.10       3,7
150  231    9.32 1-2  Roch 17058190/AUTO ONLY (TURBO)	1257426   1.55 H	42.70       
155  350    9.70 1-4  Roch 17058241/AUTO ONLY		1249169   1.55 H	50.00       
160  305    9.39 1-4  Roch 17058202,4/AUTO ONLY		 458520   1.50 H	59.10       5,8
165  231    9.32 1-4  Roch 17058240/AUTO ONLY (TURBO)	1257407   1.55 H	42.70       4,6                      
180  403    9.18 1-4  Roch 17058250,3,8,553/AUTO ONLY	 411990   1.60 H	71.69       6                  

1    Alt carb - 17058188/Auto                         
2    Alt carb - 17058182,1705814,447/SM  17058182,3,5,7,9/Auto carb size 1.686 X 1.093                        
3    Alt carb - 17058120,113/SM  17058112,408,412/Auto                         
4    Alt carb - 17058246,540/Auto Only                    
5    Carb sizes - 1375x2250/1093xAV
6    Carb sizes - 1375x2250/1218xAV
7    Alt manifold - 346260                                                                                                   
8    Alt manifold – 346249
9    Carb sizes – 1686/1093

            Deck      Piston Type                   
H.P. Disp.  Cl      Dish/Dome     Ht/Vol         Valves    Cam Lift         Springs        Notes     
 95  196   .035     Dished    .103"	 8.69cc    1630/1430 340/401		Outer w Damper
105  231   .035     Dished    .245"	22.70cc    1630/1430 401/401		Outer w Damper
140  301   .019AB   Flat                        1720/1500 364/364		Outer Only
145  305   .002     Dished    .107"	12.44cc    1725/1505 373/410		Outer w Damper
150  231   .035     Dished    .245"	22.70cc    1630/1430 340/401		Outer w Damper
155  350   .010     Dished    .245"	22.70cc    1880/1555 329/344		Outer w Damper   A,B
160  305   .002     Dished    .107"	12.44cc    1845/1505 373/410		Outer w Damper                             
165  231   .035     Dished    .245"	22.70cc    1630/1430 340/401		Outer w Damper
180  403   .002     Dished    .138"	16.98cc    2000/1500 440/440		Outer w Damper           
                                                                                                                                
A If TRW L2342 piston is used the legal dish depth spec will change from .245" to .230".
B PISTON DISH DEPTH ADJUSTMENTS- BADGER B422 .218 DEEP, ENGINE TECH P1504 & SILVOLITE 1746 .215 DEEP, BADGER P422A .210 DEEP, GM #25527180 .210 DEEP 

H.P. Disp.     Gasket  Head Cast

 95  196	.018	1257051
105  231	.018	1257051
140  301	.029	 526211,526201,526202
145  305	.016	 354434,376450,462614
150  231	.018	1257051
155  350	.041	1243452                                                                                             
160  305	.016	 354434,376450,462614
165  231	.018	1257051
180  403	.030	 554717

Issued:        Sept 25, 1979     
Revised:       11/12/79, 03/21/91, 11-21-94, 2-24-96, 2-16-98, 7-1-99
Bulletin #:    BUI-79    Page 1 of 1

Specifications for the   1979 Buick engines

H.P. Disp.  C.R. Ind. Make Model/Transmission               Manifold  R.R. Lifter	Head cc   Notes 

 85  151    9.45 1-2  Holl R-8775,8777,8776,8778		   500441  1.75 H	67.4          
 90  151    8.78 1-2  Roch 17059675,7,674,676		 10002948  1.75 H	48.8          
105  196    9.92 1-2  Roch 17059193,4,184,194		  1262204  1.55 H	42.7          
115  173    9.33 1-2  Roch 17059651,751,763,651,750,760	   476512  1.50 H	48.0          
115  231    9.32 1-2  Roch 17059191,180,190			  1262470  1.55 H	42.7          
130  305    9.39 1-2  Roch 17059134,134,434			 14007372  1.50 H	59.1        1 
140  301    8.74 1-2  Roch 17059160				100000516  1.50 H	67.5                           
150  301    8.74 1-4  Roch 17059271,2				100000518  1.50 H	67.5
155  305    9.39 1-4  Roch 17059203,202,502,582		 14007376  1.50 H	59.1        2,4                   
155  350    9.70 1-4  Roch 17059241				  1249169  1.55 H	50.0        3
160  350   10.30 1-4  Roch 17059203,11,202,210,502,582	   346249  1.50 H	63.3        4
170  231    9.32 1-4  Roch 17059240,2,243    TURBO		  1261568  1.55 H	42.7        3
175  403    9.18 1-4  Roch 17059250,3,256,257,258		   411990  1.60 H	71.7        3                        

Notes

1    Alt manifold - 14007374   
2    Alt manifold - 14007378,346249      
3	Carb sizes - 1375x2250/1218xAV
4	Carb sizes – 1375x2250/1093xAV
                                                                                                                                        
            Deck      Piston Type                   
H.P. Disp   Cl     Dish/Dome    Ht/Vol	Valves   Cam Lift  Springs   	   Gasket   Head Cast   Notes
                                                                                                                                   
 85  151   .000     Flat      N.A.  N.A.	1720/1500 406/406  Outer Only	    .027    498597
 90  151   .000    Dished    .246" 23.64cc	1720/1500 406/406  Outer Only	    .032    100000702
105  196   .050    Dished    .055"  5.52cc	1710/1500 340/401  Outer w Damper .018    1262098,1262095 
115  173   .015     Flat	N.A.    N.A.	1600/1307 347/394  Outer w Damper .038    476503
115  231   .035     Dish	.240" 22.70cc	1710/1500 401/401  Outer w Damper .018    1262098,1262095 
130  305   .002     Dish	.107" 12.44cc	1725/1505 373/410  Outer w Damper .016     376450,462614  
140  301   .018     Flat      N.A.   N.A.	1720/1500 364/364  Outer Only	    .038     526211,01,02    
150  301   .018     Flat      N.A.   N.A.	1720/1500 364/364  Outer Only     .038     526211,01,02    
155  305   .002     Dish      .107" 12.44cc	1845/1505 373/410  Outer w Damper .016     376450,462614   
155  350   .010     Dish      .245" 22.70cc	1880/1555 329/344  Outer w Damper .041     1243452   A,B 
160  350   .002     Dish      .064"  9.92cc	1945/1505 390/410  Outer w Damper .016     376450,462624        
170  231   .035     Dish      .240" 22.70cc	1710/1500 340/401  Outer w Damper. 018     1261377,25504443
175  403   .002     Dish      .138" 16.98cc	2000/1500 474/474  Outer w Damper .030     554717             

A If TRW L2342 piston is used the legal dish depth spec will 
  change from .245" to .230".
B PISTON DISH DEPTH ADJUSTMENTS- BADGER B422 .218 DEEP, ENGINE TECH P1504 & SILVOLITE 1746 .215 DEEP, BADGER P422A .210 DEEP, GM #25527180 .210 DEEP 

Issued:        May 25, 1980      
Revised:       2-16-98, 7-1-99                   
Bulletin #:    BUI-80    Page 1 of 1

Specifications for the   1980 Buick engines

H.P. Disp.  C.R. Ind. Make Model/Transmission               Manifold  R.R. Lifter	Head cc   Notes 

 90  151    9.22 1-2  Roch 2SE				10002948  1.75 H	48.82
105  350   23.50 FI   Stan					  558652  1.60 H	19.8
110  231    9.32 1-2  Roch 17080191/SM    17080190/AUTO	22502702  1.55 H	42.7        1
115  173    9.33 1-2  Roch 17059651/SM    17059650/AUTO	  476512  1.50 H	48.0        2
120  265    9.09 1-2  Roch 17080160/AUTO			10009963  1.50 H	60.26
125  252    9.39 1-4  Roch 17080244/AUTO			25502243  1.55 H	42.7	    8
140  301    9.53 1-4  Roch 17080272/AUTO			10009965  1.50 H	67.47
155  305    9.87 1-4  Roch 17080207/SM, 1708054/AUTO		14014432  1.50 H	55.0        3,4   
165  350    9.06 1-4  Roch					  411990  1.60 H	66.35       5
170  231    9.32 1-4  Roch 17080240,2,3,7/AUTO ONLY TURBO	22504240  1.55 H	42.7        6,7
                                                                                                   
Notes

1    Alt carb - 17080192,5,7/AUTO
2    Alt carb - 17059751,763/SM   17059650,750,760/AUTO
3    Alt carb - 1708202,502/AUTO
4    Alt manifold - 14014440                     
5    Alt manifold - 22503087,4086
6    Alt manifold - 5881           
7    Carb sizes - 1375x2250/1218xAV
8    Carb sizes – 1375x2250/1093xAV

            Deck      Piston Type                   
H.P. Disp.  Cl     Dish/Dome Ht/Vol          alves    Cam Lift	Springs		Gasket    Head Cast
                                                                                                   
 90  151  .019AB   Dished    .246"  23.64cc	1720/1500 398/398	Outer Only	.032      100007203
105  350  .018AB   Flat w/n			1875/1625 375/376	Outer w Damper	.046      588769
110  231  .035     Dished    .240"  22.70cc	1715/1505 401/401	Outerw/Damper	.018  2506293,25505900
115  173  .105     Flat			1600/1307 347/394     Outer w Damper	.038      476503
120  265  .018AB   Dished    .037"   3.32cc	1600/1380 358/358     Outer Only	.035     10007203
125  252  .010     Dished    .271"  27.60cc	1715/1505 401/401     Outer w Damper	.047     22506293
140  301  .018AB   Flat			1720/1500 344/344     Outer Only	.038  0004187,14006,1750 155  305  .002     Dished    .107"  12.44cc	1845/1505 357/390     Outer w Damper .016     14014416
165  350  .002     Dished    .131"  11.86cc	1875/1500 474/474     Outer w Damper	.030      554716
170  231  .035     Dished    .240”  22.70cc	1715/1500 340/401	Outer w Damper .018  22506293,2550590                              

Issued:        25 July 1981      
Revised:       2-16-98, 7-1-99                   
Bulletin #:    BUI-81    Page 1 of 1

Specifications for the   1981 Buick engines

H.P. Disp  C.R. Ind. Make Model/Transmission              Manifold   R.R. Lifter  Head cc   Notes 

 84  151   9.22 1-2  Roch 17081671/SM    17081670/AUTO	10002948  1.75 H	48.82               
105  350  23.50 FI   Stan					22510013  1.60 H	19.80       3
110  231   9.32 1-2  Roch 17081199/SM    17081191/AUTO	 1261470  1.55 H	42.70       1,4       
115  173   9.33 1-2  Roch 17081651/SM    17081740/AUTO	  496512  1.50 H	48.00       2         
119  265   9.51 1-2  Roch 17081160/AUTO ONLY			10009963  1.50 H	60.26
125  252   9.39 1-4  Roch 17081245,7,8,9,89/AUTO ONLY	25502243  1.55 H	42.70       8                      
140  307   9.61 1-4  Roch 17081250,3/AUTO ONLY		22503087  1.60 H	59.85       5,7  
170  231   9.32 1-4  Roch 17081172,243/AUTO ONLY TURBO	25506512  1.55 H	42.70       6,7       
                                                                                                                                   
1    Alt carbs - 17081194,7,8,496/AUTO
2    Alt carbs - 17081742,650,2/AUTO                                                                                         
3    Alt manifold - 22510015
4    Alt manifold - 25506507
5    Alt manifold - 22504068
6    Alt manifold - 25507680
7	Carb sizes - 1375x2250/1218xAV
8	Carb sizes – 1375x2250/1093xAV

               Deck      Piston Type                   
H.P. Disp.      Cl     Dish/Dome Ht/Vol             Valves    Cam Lift     Springs                                      

 84  151	.019AB	Dished    .246"  23.64cc	1720/1500 406/406	Outer w Damper
105  350	.018AB	Flat w/n			1875/1625 375/376	Outer w Damper
110  231	.035	Dished    .240"  22.7cc	1715/1505 401/401	Outer w Damper
115  173	.015	Flat				1600/1307 347/394	Outer w Damper
119  265	.018AB	Flat				1600/1380 373/373	Outer Only
125  252	.035	Dished    .240"  22.7cc	1715/1505 401/401	Outer w Damper 
140  307	.002	Dished    .072"  5.42cc	1750/1502 474/474	Outer w Damper
170  231	.035	Dished    .240"  22.7cc	1715/1505 340/401	Outer w Damper                                 
                                                                                                                                   
H.P. Disp.     Gasket    Head Cast
               
 84  151	.032	100000702
105  350	.046	22507709
110  231	.018	25505900,6293
115  173	.038	476503,14031327                                                                                    
119  265	.035	10007203
125  252	.018	25505900,6293  
140  307	.030	22503317
170  231	.018	25505900,6293

Issued:        25 May 1982       
Revised:       2-16-98, 7-1-99                  
Bulletin #:    BUI-82    Page 1 of 1

Specifications for the   1982 Buick engines
                                                                                                                                   
H.P. Disp.  C.R. Ind. Make Model/Transmission              Manifold  R.R. Lifter  Head cc   Notes 

 85  262   23.50 FI   Stan					22510852  1.60 H	19.82        2
 90  151    8.50 FI   Roch 17082060/ALL			10018019  1.76 H	52.25         
105  350   23.50 FI   Stan					22510013  1.60 H	19.8         3
110  181    9.67 1-2  Roch 17082196/AUTO			22509504  1.55 H	42.7 
112  173    9.33 1-2  Roch 17082641,442,316/ALL		14024266  1.50 H	48.0         4
115  231    9.32 1-2  Roch 17082192,4/AUTO			25509950  1.55 H	42.7
125  252    9.39 1-4  Roch 17082294,5,8/AUTO ONLY		25512236  1.55 H	42.7
135  173    8.90 1-2  Roch 17082321/SM    17082642/AUTO	14024266  1.50 H	51.0         5
140  307    9.61 1-4  Roch					22503087  1.60 H	59.85        6
170  231    9.32 1-4  Roch 17081242,2244/AUTO ONLY TURBO	22510179  1.55 H	42.7       1,7                         

Notes                                                                                                                           

1    Carb sizes - 1375x2250/1218xAV
2    Alt manifold - 22511955 
3    Alt manifold - 22510015 
4    Alt manifold - 14042539,476512                                                                                                
5    Alt manifold - 14042539,476512
6    Alt manifold - 4068            
7    Alt manifold - 2542            

           Deck      Piston Type                   
H.P. Disp   Cl     Dish/Dome Ht/Vol         Valves    Cam Lift   Springs          Gasket    Head Cast            

 85  262  .014AB  Flat w reliefs		1875/1625 375/376   Outer w Damper   .046      22512007,228
 90  151  .025    Dished    .206"  20.06cc	1725/1505 406/406   Outer Only       .038      10020542
105  350  .018AB  Flat w/n			1875/1625 375/376   Outer w Damper   .046      22507709
110  181  .018    Flat				1715/1505 341/366   Outer w Damper   .018      22506293
112  173  .015    Flat				1605/1307 347/394   Outer w Damper	.038   476503,14024258         
115  231  .018    Dished    .240"  22.70cc	1715/1505 357/366   Outer w Damper	.018      22506293
125  252  .018    Dished    .271"  27.60cc	1715/1505 357/366   Outer w Damper	.047      22506293
135  173  .015    Flat				1725/1430 393/410   Outer w Damper	.038   476503,14031327
140  307  .002    Dished    .072"   5.42cc	1750/1502 474/474   Outer w Damper	.030     22503317
170  231  .035    Dished    .240"  22.70cc	1715/1505 341/366   Outer w Damper	.018     22506293