In this link is a CFM calculator.The thing is no one asked you anything about camming/heads etc.You should understand that using someones personal experiences may or may not be the best possible end result.It might work for their application and be meaningless to yours.Gear ratios/tire sizes??.So start with the link and lets walk you threw the doors you need to max a carb for your car.

AutomotiveCalculators and Converters