I have an extra set no cracks I have 3dodge 1500 rams 2 5.2 one5.9 and never found one yet with cracked head bad head gasket bent valves but no cracked head
So you had all them hot tanked and magnafluxed? If not they may have been cracked and you didn't know it. They generally crack between the seats and don't cause an issue with running until they get real bad. Nearly everyone I talk to has found numerous factory magnum heads cracked. Hard to find ones that aren't