Good looking Challenger.

Those A body Tough Wheel adapters are also available in B bodies and Truck/Vans if they got the tough wheel or a similar style factory wheel. They seem to became more prevalent after 74 in the B bodies and Truck/Vans. I am pretty sure (correct me if I am wrong) that the tough wheel was a dealer only option in the 74 and older B bodies.

This is the Grant GT and their short wheel adapter in a Challenger.