WTB 750 carb $$$
The rule is to use max rpm and cubic inches to determine what you need, but most people get more carb than that says they need.
You can have a 750 main body that flows 800 cfm,
and of course you can have a 750 that is only pulling through 500 if that is all the motor will pull through,
I always like the 700 cfm holley, cause I felt it was not too much, not too little, for alot of motors out there.
You lose a little throttle response and the car will behave different if you have too much carb on it. I believe it cuts down on intake air speed velocity but I am no expert.

