Hey man i was looking into those proform main bodies...what about them makes you pick up so much power over the factory holley main body? if i was to use a 750 cfm vs carb and stick a proform main body on would it increase cfm to make power (thus making it like 800 or something) or just increase power while still flowing the same? also, my thinking was that a 750 wouldnt have as good of throttle response as a 650, but i do plan to add more power sometime in the future so i guess maybe getting right once is the better way