Wallace Racing

Search for Pontiac Cylinder Heads

As You Go Thru Life... DO A WHEELIE !!!

Pontiac Cylinder Head Search Interface


Year:
Engine:
Hp:
Code:
Valve:
Misc:



Chart to mill Pontiac Cylinder Heads
Chart of C.R. of Pontiac Engines and Heads
C.R. Percent Power Loss

Pontiac made closed chambered heads until 1967.In 1967 Pontiac made some open chamber heads(i.e. 061).After 1967 the heads were open chamber heads.

Exhaust Crossover Port Matchings
With HeadAnd ManifoldUse Gasket
1965-711965-711965-71
1965-711972-791972-79
1972-791972-791972-79
1972-791965-711965-71**

** Use sheet stainless steel block off plate.






In 1973 Pontiac started stamping extra numbers (1/4" tall) on their heads.These head numbers represented chamber sizes.They are usually stamped on the machined pads by the valve covers.

Head ID Location

Stampings on Head codes - 51,5C,6X,6S,6H
2- 101cc's probably special 455 head for 455HO T/A
4-91 cc's350/W72 engine; - 77,78,79 stick T/A's engine code WA,WC,& PWH; - 77/78 W/72 auto T/A code Y6 (77) & X7 (78); - Can-Am's with T/A 6.6
6-114cc's ?any 455 head (75-)
7-98 cc's400 AIR (5C or 6S)
8-98 cc's400 standard (5C or 6X)
9-91 cc's350 AIR (5C or 6S)

Stampings on Head codes - 4X
1H - 112cc's2.11/1.66 valve455 head -screw in studs(4 bbl?) some pressed in
3H -98 cc's2.11/1.66 valve400
4H -98 cc's1.96/1.66 valve350/400
7H -98 cc's2.11/1.66 valve400 screw in studs
(Let me know if you know of any more of these codes.)


Pontiac Intake Manifold Years Interchange

  • 1957-1958
  • 1959-1960
  • 1961-1964
  • 1965-1979
    • Does not apply to 301 or the RA V