Quote Originally Posted by 87AeroSS
Well this is my first big block so bear with me. It's a 427 tall deck (#3969858) with (#343772) heads. My question is are these heads any good. If so what are the valve sizes and the combustion chamber volume. Any help would be appreciated..
It really depends on what you are going to do with the engine.
I have never flow-tested that part number before.
I do know they used that head on the 366 truck engines and I would say they have the small intake ports.
If it is going in a pick-up and will see no more than 4,500 rpm's use the heads.
If you are trying to build a 550 hp engine for a car you better buy some better heads.