What size carb do I need?

I have a 454 with Dart Pro1 CNC heads and a Whipple supercharger. I am currently running a Holley 850 however I want to take the RPM up to about 5600-5800 and wondering if this is enough carb.

Thanks Budah. I run 8lbs boost, and hieght is an issue for me so I currently run 3"x8" flame arresters.

I haven't had chance to test with a vacum gauge, will do that this weekend.

Has anyone tried the Barry Grant 1025 CFM Race Demon blower carb on a similar combination?