Highest flowing sbm heads?

Bakerlite said

Sure, but I don't go around running my chops like I'm trying to be some sort of tire or wheel expert either.
The only opinion you can give is who has built a good engine for you, other than that, not much else.

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I give plenty of good info and just because someone machines, ports and assembles an engine for me doesn't mean I know nothing about the engine and don't work on it...to be honest I probably work on my car front to back all aspects more than most truth be told.