408 Magnum stroker HEAD HELP!

CDN68 said

Right now i remember i looked at the SM heads briefly but was looking at the CC's of the heads and didnt go further and i should have my fault

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It's only a problem if your goal was 500 hp and or more. Your gonna need a little more flow and or cam/cr.
You probably can pick up some cfm with good valve job and a bit of bowl work and maybe some chamber de shrouding some of the head experts can help you there.