Re: Cylinder head casting # 14102193
RBob is correct, 083 is the correct head casting for a 5.7 TPI engine. With a little porting and good springs, the 083 heads perform pretty good. They have a 64 cc chamber, which is a plus. Having 193 heads on there is a pretty good indication that you probably got a truck motor in there. The downside to that is the block itself usually isn't totally identical to the f-body ones. The bad part about that is the truck engines usually got a flat tappet cam instead of the factory hydraulic roller cam, and a lot of times the block won't be fully machined for accepting a roller cam setup. If you're lucky, your block might have all the machine work already done to accept a roller cam. If not, you'll be stuck with a flat tappet cam unless you have the finishing machine work done. Flat tappet cams are ok, but having the hydraulic roller is so much nicer. Your best bet would probably be to hunt down a 87-92 f-body or corvette 5.7 to put in there, unless you don't mind running the flat tappet cam. If you decide to stick with the motor you've got now, I'd suggest at least ditching those 193 heads for better ones.
89RS w/350 TPI; 69RS/SS w/450 HP 350/Muncie 4-Speed "Too weird to live, too rare to die."