Carburetor cfm calculator

I started checking into the cost of doing this build, a new performer intake for the sbm's is $363. I'm not paying almost $400 for a intake manifold, not going to happen. I'll wait till spring when swap meets open up.
I got your back on that one! Especially for the Performer? It's a decent intake but puhhlleezzzz. No way. You can find something reasonable if you hold out.