I need some help with carb size thing is I have to holley carbs one a 600cfm the other a 750 cfm Im not sure which to use though. My 429 is a 1972model and it only has a 8:5:1 cr, it is all stock internally, even cam, the only mods really, are no smog, or egr, no a/c , timing advanced, 1" carb spacer, and 160* thermostat, and dual 2.5" exhaust ,oh and it had thr d2ve heads which suck only made 1 year with open chambers i switched them out for a set of fresh d3ve, same cc size but closed chambers.What carb would you reccomend, and how much power do you think this motor will make?