Happster's '72 scamp build!

A 770 is going to be awfully big for a 318, even with a performance build. Also keep in mind that the 770 cfm rating for that holley is a wet flow rating, that works out to about 850 cfm dry flow (edelbrock, etc).

I've been told the 770 Street Avenger I have is going to be too big for my 400-450hp 340 more than a couple times. I already have it, so I'm just going to give it a try when I finish the engine, but you'd probably be better off with a 670 street avenger for even a performance built 318.