Originally Posted by roadkill2

Lessee, the question was about compression ratios with a BBC . . Then I added more to the same question . .

Is there anyone looking at this that has a clue? Not being a wiseass, but there is no such thing as "More heads" . . it's what you do to the heads and the corresponding valve train that improves your E.T.s . . Also compression has a hell of a lot to do with both 60' time and top end MPH . .

Currently, math and competiton tells us we're building somewhere between 650 to 690 HP. At this point, the heads are fine, but we're putting together a "Back up Bullet" which is the reason for the query . . We would like to know what the compression ratio should be ideally for a high altitude engine that can be taken to near sea level without changing pistons or heads . . and without beating hell out of it on top end . .

I'm a novice on Chevy Truck motors, although back aways I tuned and was crew chief to several Blown Alky cars . . Just never screwed with anything with doors or a carburetor on it . . Just thought some old hands that know some of the short answers might have something for us . .

Guess not . . .