You may have some issue with something like.......................
Maybe a POS is in the bottom of the oil pump drive hex, and is holding the drive gear "up" too far, causing thrust wear?
Bad intermediate gear bushing?
Some misalignment/ damage to the intermediate gear?
And as others have said, just what is going wrong with them?
Also, rebuilts were never all that great, and now that "you can't buy" the old school Mopar distributor bushing kit anymore, they might just be all that much worse.