1972 Demon 340 engine mods

Miszny said
These are not factory pistons for sure. Its something aftermarket.
They look identical to the ones in the photo.

View attachment 1715184256

IIRC that is a factory replacement piston for the early 340. Why they put 4 valve notches in it I can't say. Seems dumb to me but that's the way I remember it.