Long Time Mopar Mechanic and Racer who did have super stock cars. I will take picture of back, but no KH markings on rotor or hub. Just some other casting mark. The Studs are marker with KH though.

Both Rotors have RH studs and they cross by dorman as 1972 Chrysler ONLY. The Stud Head is unique as compared to the other 2 piece KH or Bendix rotors. In matched perfect to the picture in a Dorman 1984 catalog. Hub and rotor is a match to the 7/16" 4" pattern A body hubs, and is small bearing which is what drove me to a 1972 type.

Did Mopar make another run of parts in 72 for the early cars or as an upgrade to add 4.5" pattern?