Ram Air IV versus 455 HO

[supergonzo]

Sorry Charlie I wasn't here !

All Pontiacs are internally balanced (like any good motor really should be). In fact in the later years Pontiac discarded the dampner as it is called in the Pontiac world altogether. And used hubs. Their only purpose is to to show where the timing marks are. As a side benefit you can find any dampner and stick it on any engine that fits without throwing the engine out of balance.