Originally Posted by Y-Blockhead
Just because you have a 600 cfm carburetor on your 272 it does not mean your engine could flow 600 cfm. With that big of a carb I doubt your secondaries are even opening. I would suggest a 390 or 450 cfm.
Almost hi-jacked thread...sorry. My 292 is .060 over, mild cam, larger valve heads, and dual exhaust (manifolds) and I am over carbed with the 600...just FYI...