The head is on the bench, it clearly needs reconditioned, or cleaned & checked out/touched-up at the very least. Looks like it may have Street Hemi springs on it, not the stiffest, but capable of handling a decent cam. If that's all that is required, a repair on that would be reliable.
I've had to repair the early aluminum 4-pedestal 3.8L heads a few times, the end pedestal(Dr. Frt. or Pass. Rr.) broke free on a lot of those, the Frt. head on one ran until the shaft broke & set a misfire code clacking away. Clean it, JB Weld the mating surface, then bolt the shaft down & add/devise a clamp adjacent to the failed pedestal. Once it's cured, deep-drill the hole for the tap size, then run a tap using the current threads guiding it through to the bottom. Gauge thread length & depth, find an appropriate cap screw or stud with enough thread to engage the pedestsal threads and the parent head material, drilling out some of the top threads if needed.
Put it together & run it, using sealant if You get into water etc., that's all.
I've had to repair the early aluminum 4-pedestal 3.8L heads a few times, the end pedestal(Dr. Frt. or Pass. Rr.) broke free on a lot of those, the Frt. head on one ran until the shaft broke & set a misfire code clacking away. Clean it, JB Weld the mating surface, then bolt the shaft down & add/devise a clamp adjacent to the failed pedestal. Once it's cured, deep-drill the hole for the tap size, then run a tap using the current threads guiding it through to the bottom. Gauge thread length & depth, find an appropriate cap screw or stud with enough thread to engage the pedestsal threads and the parent head material, drilling out some of the top threads if needed.
Put it together & run it, using sealant if You get into water etc., that's all.
