I dont know how to prove something like that but.... back in the day Cragar alledgedly made 4 special offset 15" rims for the rear of his SuperStock Camaro that were made to center in the middle of the stock wheelwell. They were ordered thru Keystone. Keystone mis delivered 2 of them to a speed shop in Souderton Pa. In the 24 hours it took them to track down the 2 errant wheels they wound up on the back of my car and I refused to sell them back. I still have them. Its a great unprovable story and 2 slightly odd looking Cragars. The chrome didnt hold up any better on them though.