Yea as above it was a precautionary tear down due to run time on the motor,

Bearings had wear as expected with the power and abuse its had,

The spark plug holes had the usual cracking thag all gd heads have, the unknown was the exhaust inserts had cracks too. Those heads had been bored out , machined , ported , repaired from a valve drop 5 or so times so not totally a shock, was just good time before a major failure