Steff,
I know what you are talking about when it comes to HP.I know which motor you are talking about and Davis built a 418 inch chevy that makes the same power with the same intake and he said my heads flow alittle better than his,but the power output of the chevy versus mopar is way off.The chevy still makes more power.Tim still to this day scrathes his head over this and cant come up with a good conclusion....