ProComp/Speedmaster aluminum heads

oldkimmer said

Hopefully Tony chimes in again. He has had a few sets done and seems happy. There is more than a few guys running these and some I’m sure ootb. So a little help should do wonders for these heads. There will always be the Chinese haters. But I bet if u looked in there drive way, house, shop u will find 75% Chinese appliances, electronics and tools etc. Oh ya, on or in there pride and joy American made Mopar. Kim

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Yes...i have a set in use...they are the Cnc model I bought bare. Had local machine shop assemble them. I am using PAC 1903 springs that install at 1.80 @ 140ish lbs. Cam in that engine is a Hughes 254/260 with .600/.615 lift. I am using SM stainless steel intake and exhaust valves, and their retainers and keepers. The 75 Duster has run a best so far of 11.72 @ 114 a few weeks ago in our wonderful air with DA just over 5000 ft. Engine is 360 .020 using seal powered 116hcp pistons....Chinese h beam rod and stock crank. Eddy Air gap intake....might be swapped out for Holly SD someday.... just old style bracket car with SS springs and CE shocks on the corners. Dont have alot of passes on engine.