Engine codes Pontiac GTO 1964 - 1970
 
Engine Code Cyl Head Intake Carb MT Carb AT Exhaust Exhaust 3x2 Carbs MT 3x2 Carbs AT
  MT /
AT
MT /
AT
Man (center) (center) Man RH Man LH Front Rear Front Rear
64 389-4V 78X / 79J 9770716 9770274 AFB 3647S AFB 3649S 9779328 9779032        
64 389-6V 76X / 77J 9770716 9775088 7024175 7024173 9779328 9779032 7024178 7024179 7024178 7024179
65 389-4V WT / YS 9778777 9782895 AFB 3895S AFB 3651S 9779328 9779032        
65 389-6V WS / YR 9778777 9778815 7025175 7025177 9779328 9779032 7024178 7024179 7024178 7024179
66 389-4V WT / YS 093 9782895 AFB 4033S AFB 4034S 9779328 9779032        
(CALIFORNIA) WW XE 093 9782895 AFB 4041S AFB 4030S 9779328 9779032        
66 389-4V WS YR 093 9782898 7026075 7026074 9779328 9779032 7024178 7024179 7024178 7024179
(CALIFORNIA) WV YR 093 9782898 7036175 7026074 9779328 9779032 7024178 7024179 7024178 7024179
66 389-RA XS  
--
093 9782898 7036175 N/A 9779328 9779032 7024178 7024179    
67 400-2V -- 
XM
9788064 9784437 N/A 7027061 9779328 9779032        
(CALIFORNIA) -- 
XL
9788064 9784437 N/A 7036172 9779328 9779032        
67 400-4V WT / YS 670 9786285 7027263 7027262 9779328 9779032        
Engine Code Cyl Head Intake Carb MT Carb AT Exhaust Exhaust 3x2 Carbs MT 3x2 Carbs AT
  MT /
AT
MT /
AT
Man (center) (center) Man RH Man LH Front Rear Front Rear
(CALIFORNIA) WW / YS 670 9786285 7027263 7027262 9779328 9779032        
67 400-HO WS / YZ 670 9786285 7027263 7027262 9777641 9777646        
(CALIFORNIA) WV / YZ 670 9786285 7027263 7027262 9777641 9777646        
67 400-RA XS / XP 97* 9786285 7027263 7027262 9777641 9777646        
(CALIFORNIA) YR / XP 97* 9786285 7027263 7027262 9777641 9777646        
68 400-2V -- 
XM
9792266 9799067 N/A 7028060 9794320 9779032        
68 400-4V WT / YS 16 9794234* 7028263 7028268 9794320 9779032        
68 400-HO WS / YZ 16 9794234* 7028267 7028268 9777641 9791637        
68 400-RAI XS / XP 37 9794234* 7028275 7028274 9777641 9791637        
68 400-RAII WY / XW 96 9794234* 7028273 7028270 9794033 9794035        
69 400-2V -- 
XM
9792266 9799067 N/A 7029060 9796992 9782810        
69 400-4V WT / YS 48 
62
9794234 7029263 7029268 9796992 9782810        
Engine Code Cyl Head Intake Carb MT Carb AT Exhaust Exhaust        
  MT /
AT
MT /
AT
Man (center) (center) Man RH Man H        
69 400-RAIII WS / YZ 48 9794234 7029273 7029270 9797072 9791637        
69 400-RAIV WW / XP 722 9796614 7029273 7029270 9797075 9794035        
70 400-4V WT / YS 12/ 
13
9799068 7040263* 7040264* 9796992 9782810        
70 400-RAIII WS / YZ 12 9799068 7040273* 7040270* 9799720 478140        
70 400-RAIV WW/ XP 614 9799084 7040273* 7040270* 9799721 478141        
70 455-4V WA / YA 64 9799068 7040267* 7040268* 9796992 9782810        
(With RA) WA / YA 64 9799068 7040279* 7040278* 9799720 478140        
 
*= Early '670' *=Also 9790140 *=5th Digit is '5' if equipped with E.E.S.