Here are the back pictures and there was a number on the rotor. If the Dorman Catalog is correct the studs in these, and they seemed to be original are a 1972 stud. Cross to a 3580598 Chrysler part number. Which some dealer have listed incorrectly as a rear stud.

I also noticed that the casting symbol after the rotor number looks like a casting symbol I have seen on the 90425 KH type Pin Caliper Brackets.