What do you wanna know? Ive dealt with quite a few 400+ci SBC motors, even have my 406 shortblock still, with ARP studs etc.
Those heads are pretty much junk, looks like its probably got a cam in it going off the intake and rockers.
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5.3L LSx, Fbody .500 cam, TH400, 4500 Stall, Moser 9"
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