cook-dw,
Cool pics of the spare tire!
The "82" mark on the inside surface of the rim appears to be a sequence number applied during the assembly build process of the car. I am investigating sequence number markings and have asked about this practice at the Norwood plant in a separate discussing thread on CRG (Norwood only because that is where my '69 Camaro was built. Several folks have found seen sequence numbers marked on fuel tanks, heater boxes, and on firewalls. My '69 Z28 has "63" marked on the fuel tank and heater box.
Is there any evidence of an "82" marking anywhere on your firewall?
Going on the assumption this car is an unrestored survivor, if you have removed your fuel tank was there a number marked on it?
If you remove the glove box liner, can you see a number on the top surface of the heater box?
Thanks,
Dave