Which Carb Type?

I had an eddy 600cfm on a slighty warmed over 360 and it wasn't to bad but had some tunning issues I could not over come. At the time I thought it was my inexperience at carbs. Than I built myself a 360 that had some nuts and tried to run a eddy 750cfm. Nobody I went to could help me get it tuned right. I ended up selling it and getting a 650 cfm mighty demon and haven't had any issues since.