JerzLT1

So i decided to part out my LT1 car due to owning a house and the fact that i haven't really driven it since i got it back. I never had the heads or intake off of the car but the intake and heads came off to verify that everything was in good condition. this is what was found.






Never had a bad spark plug come out (the damage looks too long to be an electrode anyway) and it's only been down the track twice on spray (only a 100 shot) and once on the dyno (225 shot that the builder installed). Any idea on what the damage could be from?