I have a 69 351w bored 30 over with flat top pistons, electronic ignition, rpm air gap manifold, 1.6 roller rockers, performer rpm heads with 1.90/1.60 valves, long tube hooker headers, and presently a 600 holley 4160. The car runs pretty good now, but i recently had a 750 3310 given to me. I have always heard too big of a carb is worse than to small of a carb. So should i stick with the 600 or do i have enough motor to justify swapping it out for the 750? I really appreciate any input.