Does this 5.9 Magnum look ok?

I put my $$$ on previous spark plug lost tip or ground tab due to detonation, caused by carbon build up from belly pan gasket. The detonation toasted the head gasket and thats what you have left....

TrailBeast said

The crank has to come out for a piston removal,

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What ??????????????????????????? Guess I have been doing it wrong for last 40 years....