I once had a piston like that. Oldsmobile V-8 that swallowed a screw.
I replaced the head. Piston looked fine. Just a bit scratched up...not quite as gouged as yours.
Engine threw a rod 50 miles later.
Turns out that the piston had been damaged where I couldn’t see it....it broke up and the rod came loose.
You think pistons hitting valves is loud? You should hear a wrist pin slapping the inside of an iron block...
However, that anecdote doesn’t really answer your question.
To be very honest, I don’t know how to assess piston damage visually, but for me, I would not trust a block with that kind of damage.
I would hope someone like Hoonk will chime in.
I am so sorry that this happened... I really don’t know what to say...
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