1979 camaro carburater question
 

i have a 1979 camaro running a 400 sbc 4-bolt and i just put a b&m 471 not 100% sure on the compression in the motor but its gotta be between a 8:1 - 9:1 its got 2.02 dart 2 heads and a 509 cam i just need help with knowning what the best cfm to run would be without over carbing it and dont bring up holly carbs i wanna stick with a edlebrock