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Pontiac V8 Cyl Head Info

This Cyl Head information was gathered from MANY sources including the Pete McCarthyBooks, HO Racing Books, Q&A on www.classicalpontiac.com, research by John V, andothers.

I make no guarantee that information on this chart is either complete or 100% correct.

This page was last updated 04/30/2002
If you have any corrections or updates, please e-mail them to me at geebjen@frontiernet.net

Year Engine Cast Code Casting # Part # Stud Type Intake Exhaust Volume
                 
59 389 531395     Press 1.88 1.60 68
60 389SD 535461 535461 535460 Pinned 1.92 1.60 68
60 389 536109     Press      
61 195/389 538177     Press 1.92 1.66  
61 389/421 SD 540306 540306 540304 Pinned 1.92 1.66 68
62 195/389 538177     Press 1.92 1.66  
62 389/421 SD 540306 540306 540304 Pinned 1.92 1.66 68
62 389/421 SD 544127 544127 544124 Pinned 2.02 1.76 68
63 389 543796     Press 1.88 1.60 92
63 389/421 543797     Press 1.88 1.60 72
63 389/421 SD 544127 544127 544124 Pinned 2.02 1.76 68
63 326 548232     Press 1.88 1.60  
63 389GTO/421HO 9770716 9770716 9770981 Press 1.92 1.66 68 (72)
63 421SD 9771980 9771980 9771983 Press 2.02 1.76 65
63 326 9772652     Press 1.88 1.60  
64 389 543796     Press 1.88 1.60 92
64 389GTO/421HO 9770716 9770716 9770981 Press 1.92 1.66 68 (72)
64 326/389 9773345     Press 1.92 1.66 70
65 326 22     Press 1.88 1.60 60
65 326 62     Press 1.88 1.60 70
65 389 75 9778775 9781078 Press 1.92 1.66 92
65 389GTO/421 76 9778776 9781079 Press 1.92 1.66 70
65 389/421HO 77 9778777 9781081 Press 1.92 1.66 (1.60) 68
66 389 091 9782091   Press 1.92 1.66 92
66 389/421 092 9782092 9784209 Screw (?) 1.92 1.66 70
66 389GTO/421HO 093 9782093 9784212 Screw (?) 1.92 1.66 68
66 326 094 9782094   Press 1.92(1.88) 1.66(1.60) 68
66 326 095 9782095   Press 1.88 1.60  
67 400 061       2.11 1.77 72
67 326 140 9786140     1.92 1.66  
67 326 141 9786141     1.92 1.66  
67 400 142 9786142     1.92 1.66 90
67 400 143 9786143   Press 1.92 1.66 75
67 400/428 670 9787670 9788067 Screw 2.11 1.77 72
67 400 RA 997 9787997 9787997 Screw 2.11 1.77 72
68 400 14 9791214 9792266 Press (?) 1.96 1.66 90
68 400 15 9791215   Press 1.96 1.66 75
68 400/428 16 9791216 9790118 Screw 2.11 1.77 72
68 350 17 9791217   Press 1.96 1.66 72
68 350 HO 18 9791218   Press 1.96 1.66 64
68 400 RA I 31 9792731 9792700 Screw 2.11 1.77 72
68 400/428 62 9790062 (?) 9791559 Screw 2.11 1.77 75 (72)
68 400 RA II 96 9793596 9794040 Screw 2.11 1.77 71
69 400/428 16 9791216 9790118 Screw 2.11 1.77 72
NOTE: Some books show #16 used in 69, but it may never have been used at all in 69.    
69 400 45     Press (?) 1.96 1.66 94
69 400/428 46       1.96 1.66 68
69 350 47     Press 1.96 1.66 72
69 400 RA III 48 9795048 9795043 Screw 2.11 1.77 72
69 350 HO 48 9795048   Screw 2.11 1.77 64
69 400 62 9791562 9791559 Screw 2.11 1.77 72
69 400 RA IV 722 9796721 9796722 Screw 2.11 1.77 71
70 350/400 11 9799611     1.96 1.77 (1.66) 80
70 400 RA III 12 9799612 9799496 Screw 2.11 1.77 72
70 400 13 9799613 9799497 Screw 2.11 1.77 75
70 455 15 9799615     1.96 1.66 87
70 400 16 9799616 478102 Press 1.96 1.66 78
70 400 RA IV 614 9799614 9799498 Screw 2.11 1.77 71
70 455 64 9799364 9799362 Screw 2.11 1.77 87
71 455 HO 197 481197 481758 Screw 2.11 1.77 111
71 455 66 481766 483714 Screw 2.11 1.77 114
71 350 94       1.96 1.66 90 (96)
71 400 96 481196 481760 Screw 2.11 1.77 96
71 455 98       1.96 1.66 114
71 400 99       1.96 1.66 96
72 455 HO 7F6 486076 485319   2.11 1.77 111
72 350 7H1       1.96 1.77 (1.66) 80
72 400 7J2       1.96 1.77 (1.66) 96
72 400 7K3 486073 486316 Screw 2.11 1.77 96
72 455 7L4       2.11 1.77 114
72 455 7M5 486075 494498   2.11 1.77 114
73 455SD 16 485216 485214 Screw 2.11 1.77 111
73 350 46     Press 1.96 1.66 89
73 350 4C 494442   Press 1.96 1.66 89
73 400 4C 494449   Press 1.96 1.66 98
73 455 4X (1H) 488541 494331 Press 2.11 1.66 114
73 400 4X (3H) 488543 494333 Press 2.11 1.66 98
73 400 4X (4H) 488544   Press 1.96 1.66 98
73 400 4X (7H) 491347   Screw 2.11 1.66 98
NOTE: All 73 heads went to Screw-In Studs beginning castings around May 7, 1973.      
74 455SD 16 485216 485214 Screw 2.11 1.77 111
74 350 GTO ?? 46 494346   Screw 2.11 1.66 89
74 350 46 494346 494336 Screw 1.96 1.66 98
74 350 4C 494442   Screw 1.96 1.66 89
74 400 4C 494449   Screw 1.96 1.66 98
74 455 4X (1H) 488541 494331 Screw 2.11 1.66 114
74 400 4X (3H) 488543 494333 Screw 2.11 1.66 98
74 400 4X (4H) 488544   Screw 1.96 1.66 98
74 400 4X (7H) 491347   Screw 2.11 1.66 98
75 400 5C 495354 495345 Screw 2.11 1.66 101
75 455 5I     Screw 2.11 1.66 124
75 455 6H     Screw 2.11 1.66 124
75 455 6S     Screw 2.11 1.66 115
76 455 6H     Screw 2.11 1.66 124
76 400 6S     Screw 2.11 (?) 1.66 (?) 101
76 455 6S     Screw 2.11 1.66 115
76 350 6X (4)     Screw 2.11 1.66 94
76 400 6X (8) 500762 500801 Screw 2.11 1.66 101
77 301 01     Screw      
77 400 W72 6X (4)     Screw 2.11 1.66 94
77 350 6X (4)     Screw 2.11 1.66 94
77 400 6X (8) 500762 500801 Screw 2.11 1.66 101
78 301 01     Screw      
78 400 W72 6X (4)     Screw 2.11 1.66 94
78 400 6X (8) 500762 500801 Screw 2.11 1.66 101
79 301 01     Screw      
79 400 W72 6X (4)     Screw 2.11 1.66 94
79 400 6X (8) 500762 500801 Screw 2.11 1.66 101
80 301 01     Screw      
81 301 01     Screw