Have Fenton headers, Clifford 6=8 intake with Holley 4 bbl on a 235. Didn't want to pay the $$ for a small 4 bbl or get a used one so bought a new 600 cfm for $179 at local parts place. (It's a common carb so figured I could always resell it if it didn't work out.) Had a heck of a time getting it not to fall on its face on initial acceleration but through jet and linkage cam changes we finally go it working just fine. Way over carbed but sure turns some heads when the hood is up.
Engine tear down coming this winter.
I agree with the other posts on the cam, balancing, etc. That's what I'll be doing.