How can I tell if my 1968 Firebird is a H.O or not?
My 1968 Firebird came (to me) with a 4 barrel carburetor that had been
removed and installed was a Edelbrock. I would like to find out if this makes it a
H.O or if someone possibly added the 4 barrel later. Are there any numbers on
the block or somewhere else that can tell me for sure if it is in fact an H.O?
Thanks in advance.
The Pontiac Historical Service can probably help you. http://www.phs- online.com/services.htm
The "HO" series of cars were 6 cylinder cars of the Tempest body style. I am not aware of the designation used on a Firebird. That said, there was a base level 6 and an overhead cam 6 that was designated the "HO". So, if it is an overhead Cam 6 it is likely an HO. If it is an 8 cylinder, they did not designate it as an "HO".
The 6 cylinder cars with the high performance engine were called Sprint. There was a 4 barrel version and a one barrel version of the OHC 6 engine. There were H.O. 326 and 350 V8 cars.
The HO engines had bigger valves, hotter cam, high compression and of course a 4 barrel. Having a 4 barrel carb is not proof that the engine is HO.
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