Highest flowing sbm heads?

pittsburghracer said

I don’t make enough horsepower for this guy. He want W8 W9 horsepower on a Chevy budget. Lol.

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I don't know what I have said or done to you to make you upset towards me. Anyway what I've learned from you is, there's no cylinder head north of 320 cfm to be had for a sbm.