Having the machine shop go over them, 2 exhaust guides for sure, one valve, cracks around spark plugs on 3 holes.

This won't be a racecar, just needs to be reliable for my old man.

Buy some new ones from AA Pistons.com Head cores should be back in stock soon. They also have finished head too. Comes close to the cost of rebuilding 40+ year old heads.

I have two pair, I could part with a pair if your interested...