Pieces of steel in cylinder??

George Jets said

Boy as tough as those cam bearings look you would have figured the cam journals would be toast too.

Bearings took the hit again, and boy did they.

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Originally I was going to reuse the cam, but since I have the motor completely apart, I’m going to replace just about everything. I’m still wondering what caused all this. Could it have been solely through overheating? Or is there another factor here?