ok, if I keep this engine what kind of 4 bbl do I put on it? I have a clifford intake. I am not going radical w/this thing. Little better cam, dual exhaust manifolds (off a late 80's) and the carb. What CFM, and mechanical or vaccumm??

Jay

 

I used Holley's 390 cfm 4bbl on my 240. It works well, without going radical. It is a vacuum secondary carb, there is no mechanical secondary version. This is the recommended size of carb usually.