teringer said

With the long skirt I would say it started life as a 340 piston with a offset ground crank to raise it up mor

Dartswinger70 said

I posted that because at a glance thats a 68-71 style 340 looking setup, fly cut pistons protruding past the deck up into the combustion chamber. If it is a 360, someone put that 340 style piston in to up compression. Its possible they are custom cut pistons etc. done in a machine shop or an old aftermarket set.

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i Think you’re probably right. Looks like there’s some machining that took place. Look at the small chamfer on the pin boss. The area above it looks very true and smooth.

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