I used this when I went to EFI Technology for a blower injection system. The calculations matched what their experience showed. You will need a scientific calculator.
http://www.motorgeek.com/viewtopic.php?t=2747The hardest part for blowers is finding a good map. Turbo maps are easy, blower maps are hidden in some dark corners of the internet....in some cases.
Basically, your carb CFM will be determined by the map of the blower, as applied to the size of your engne. Your intercooler becomes a big issue if you start using serious boost, as you will see when you work through the math.
I hope you have better results than I did. These conversions suck money really fast, even while the parts are still in the boxes (where they remain to this day and probably forever.)