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pomonamissel said

dave story ported my chapman's mw stage 6 mopar heads , he claimed over 300 cfm on the intake ports

Click to expand...

I’m not sure what you have there, but actual “Chapman” stage 6’s came fully cnc ported(by Chapman), and the MW version flowed around 370+ ootb.

Stage VI Manifold Casting - Mopar Muscle Magazine