Stopped at a salvage yard today to check it out. Dude behind the counter was a total.... well, when I asked about vintage J-tin, he answered, "Nah, I just crush that junk, it ain't worth nothin"
Reason why I stopped is because he does have a couple of J-tin up at the front of the yard by the road. Some 280ZX, 300Zs and an early RX-7. Took a pic of the rims on the RX-7, I am guessing they are nothing special, but I am toyota guy not a mazada guy.

I am guessing they are just a factory mag, but wasn't sure. They were in very nice condition. It appeared that only one center cap was missing. Should I go back and see if he would separate them from the car?