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Hi, I am going to be doing the heads, intake manifold, headers , distributor ,the engine was rebuilt in 95 - 351w @ .030 over crank was ground,main bearings cam bearings etc I want to go with Edelbrock heads probably the 6022, but the question is, i am not sure what size cam is in it now, to the ear it sounds like a mild cam runs great on 87 octane, will these heads bolt on without a problem?? Thanks folks.