I have spent this past winter rebuilding my 350 small block Chevy engine. I was wondering if there is a way to figure out what the best size carburetor is I had a 750 cfm and it was surging too much at slow speeds. Any suggestions?

im new to the forums, this is my first post. but anyway, me and my dad have been building a 350. its bored .60 over, edelbrock performer intake, lunati retrofit roller .492.492 lift 062 vortec heads. ive ben having issues since ive built the motor when i rev it up then let off, the truck hardly...