600 CFM vs 750 CFM...

7M-out Indont know your engine specs but a larger carb can be used IF the rest of the engine is up for it.

I am currently running a 600 AFB on my stock 5.9, minus the rpm intake and 1-3/4 super Comp headers into a 2-1/2 exhaust.
It is a little limiting on the top end but it is a true 100% drive the street car.
(727 & 3.55's round it out.)