Put good heads on it and pray, IF:

oil pressure was good
compression seemed good (or check it with the bad head if the valves seal - no cam necessary - compression pressure will be low initially because must use cylinder vac to lift intake valve off seat - extended cranking will make high cyliner pressures - no exhaust opening...)

I spent $600 on a set of rebuilt heads on a 265k motor...

Not responsible for advice not taken...