Hemi Pistons????

I'm trying to identify some Hemi pistons. These are all Mopar Performance and have the numbers stamped in them. I have not had any luck looking up these numbers. Any help greatly appreciated:

P4532642

P4876327

P4876020


Thanks

Ben J. Gorman

Ben; The 4876020 pistons are 4.50 bore and 4.15 stroke, 12.5-1.
The 4876327 is 4.50x4.50, 9.5-1
I imagine if I dig deep enough through my old cats., I can find the third number also. Dave

Thanks for your help on this.


Ben J. Gorman