Rebuilt 302 casting heads available through Rockauto

George Jets said

You can see the silver button on the front head frost plug for the heat temp tab.

Believe they are the induction hardened, stays pretty good, think they put new valves with 3 angle grind to them. Probably just a minor lap to lap them in.

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Yes induction hardened seats, just double checked a new reman set from Rock and I have a take off set pictured here with 60,000 miles on them. Exhaust seats are standing up real nice, hardened not wearing away and sinking the valves like the non hardened valve seat heads do.