Pontiac Head Specs

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PONTIAC HEAD CHART
CASTING
NUMBER
YEAR & FACTORY APPLICATION CHAMBER
VOL# CC'S
EXHAUST
PORT
NOTEWORTHY
ATTRIBUTES
528511 1958 370 62 D-Port 1.88/1.6 55-60 INT MAN
538177 61-62 389 62 D-Port 1.88/1.6 61-64 INT MAN
543797 63 389 62 D-Port 1.88/1.60
9770716 63 421 HO,64 GTO 65 D-Port 1.92/1.66
9771980 63 421 SD 64 D-Port 2.02/1.76
77 65 GTO, 65 421 HO 65 D-Port INTAKE MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS.
093 66 389 GTO 65 D-Port
670 67 400 GTO 72 D-Port
97 LATE 67 RA GTO 65 D-Port ALL 67 & UP HEADS HAVE 2.11/1.77 VALVES UNLESS OTHERWISE NOTED
37 EARLY 68 RA GTO 72 D-Port
96 LATE 68 RA GTO 72 ROUND
62 68 & 69 GTO AUTO TRANS 75 D-Port
16 68 GTO MANUAL TRANS 72 D-Port
17 68 350 TEMPEST 72 D-Port 1.96/1.66
18 68 350 HO 68 D-Port 1.96/1.66
47 68 & 69 350 AUTO TRANS 72 D-Port 1.96/1.66
48 69 RA3 400, 350 HO 68 D-Port
722 69 RA4 GTO FBIRD 72 ROUND TALL INTAKE PORT
12 70 400 RA GTO FBIRD 72 D-Port
13 70 400 GTO GP 72 D-Port
614 70 RA4 GTO FBIRD 72 ROUND TALL INTAKE PORT
64 70 455 HO GTO GP 87 D-Port
96 71 400 GTO GP 96 D-Port
66 71 455 ALL 4BBL 114+ D-Port
191(797) 71 455 HO 108-111 ROUND TALL INTAKE PORT
94 71 350 ALL 89 D-Port 1.96/1.66
7K3 72 400 ALL 4BBL 96 D-Port LARGE EXHAUST CROSSOVER OPENING ON 72-79
7M5 72 455 114 D-Port
7F6 72 455 HO 108-11 ROUND TALL INTAKE PORT
7H1 72 350 89 D-Port 1.96/1.77(ODD)
46 73, 74 350 89 D-Port 1.96/1.66
4X,4C 73, 74 400 ALL 96-111 D-Port 2.11/1.66
16 73, 74 455 SD 108 ROUND TALL/WIDE INT PORT
6X

75-79 350 & 400 ALL
75-76 455

see chart below D-Port 2.11/1.66
5C,5X,5G 75-76 455, SOME 350 93-114+ D-Port 2.11/1.66
EDELBROCK PERFORMER RPM ALUMINUM 72 or 87 ROUNDPORT FLANGE 2.11/1.66 (1.77 optional)
HEAD C.C.'S ARE APPROXIMATE DUE TO PRODUCTION VARIANCES


OTHER SPECIAL CASTING INFORMATION

YEAR OF APPLICATION ENGINE CU. IN. VALVE SIZES CASTING NUMBER ADDITIONAL STAMPING I.D. NUMBER CHAMBER VOLUME CC'S
1975-76 400 2.11/1.66 6X 8 100.04
1975-76 455 2.11/1.66 6X 6 124.51
1977 350 2.11/1.66 6X 4 93.74
1977 400/W72 2.11/1.66 6X 4 93.74
1977 400 2.11/1.66 6X 8 100.04
1978 400 2.11/1.66 6X 8 100.04
1978-1979 400/W72 2.11/1.66 6X 4 93.74

HEAD STAMP LOCATION ON PONTIAC HEADS


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