Mill decisions

A friend of mine has a 408 ford in a maverick, his car is very close to my 72 demon with a 408 in weight, cam, carb and the same gear. He runs a twisted set of heads (machinist ported) and I use STOCK CAST J HEADS that I have ported myself with no flow bench. My car runs a tenth quicker on most days but overall the cars are very close. I think your experiences with the ford windsor will apply to the mopar as well. Both are chevy eaters (; I would not worry about heating issues, my car actually ran cooler after adding hard block and cools off faster. Although I have not run it on a long street run, I would not be affraid to (if my car was street legal) Just my thoughts, Ray