I'm not sure you'll find an answer and if someone does give you an answer there is no guarantee that it is correct. Mopar farmed those engines out to different contractors who used different parts so it all depends on when it was built and by who. They typically used cheap parts so it is going to have SCAT or Eagle parts in it not Callies or Oliver or stuff like that. I'm not sure who they used as a piston vendor, most likely the low bidder. Most likely someone like Icon rather than JE or Diamond.