What kind of head does a Pontiac head have?
What kind of head does a Pontiac head have?
PONTIAC HEAD CHART CASTING NUMBER YEAR & FACTORY APPLICATION CHAMBER VOL# CC’S NOTEWORTHY ATTRIBUTES 528511 1958 370 62 1.88/1.6 55-60 INT MAN 538177 61-62 389 62 1.88/1.6 61-64 INT MAN 543797 63 389 62 1.88/1.60 9770716 63 421 HO,64 GTO 65 1.92/1.66
When was the 4X head installed on a Pontiac 400?
Look at the other end where there is a lone un-drilled raised machined boss. This is where there will be a stamped number. The codes are listed below. The 4X head was installed on the 400 and 455 during the mid 1970’s. Most I have found are 455 stamping. 3H 2.11/1.66 valves 98/101cc’s.
How many horsepower does a 1966 Pontiac head have?
Year CID Advertised HP Head casting # Valve Sizes intake/exhaust 1966 421 356/376 hp 093 1.92/1.66 1967 326 250 HP 140 1.92/1.64 1978 350 ALL 6X-4/ 6S 2.11/1.66 1978 400 180 hp 6X-8 2.11/1.66
When did Pontiac start making open chamber heads?
In 1967 Pontiac made some open chamber heads (i.e. 061).After 1967 the heads were open chamber heads. ** Use sheet stainless steel block off plate.
Look at the other end where there is a lone un-drilled raised machined boss. This is where there will be a stamped number. The codes are listed below. The 4X head was installed on the 400 and 455 during the mid 1970’s. Most I have found are 455 stamping. 3H 2.11/1.66 valves 98/101cc’s.
When did Pontiac start putting extra numbers on cylinder heads?
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.
Year CID Advertised HP Head casting # Valve Sizes intake/exhaust 1966 421 356/376 hp 093 1.92/1.66 1967 326 250 HP 140 1.92/1.64 1978 350 ALL 6X-4/ 6S 2.11/1.66 1978 400 180 hp 6X-8 2.11/1.66
