[vettestr]

Karlos,
Whatever it ate got several holes. I see impact marks on other pistons too. It is amazing how it can go from cylinder to cylinder. If it didn't go out the exhaust you may find IT in one of the holes on the left bank when you pull that head. The plugs' electrode ceramic seems to be missing and could account for some of the damage.

I have seen damage from the damndest things, from screws falling out of the carb body or a little chunk of the head casting broken loose when new guides were installed. It does not take much to crush ring lands down on a piston or bend valves. Let me know if I can help in any way. Jeff C