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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