RT magnum head question

pittsburghracer said

Thanks I saved that to read later. His sons duster runs 6.70’s with his 408 and those heads my buddy ported deep staging.

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I’ve read where just regular heads with bowl porting on a stock short block got upwards of 400 hp. I put one together copying the 380 crate engine with M1 intake and Mopar top end kit (rockers, springs, pushrods, guide plates) ported the heads with the Mopar templates, 17 years ago, still on engine stand, lol someday