[njsteve]

Here is a photo comparison of my original hangers and the Gardner ones. I don't mean any disparagement concerning the quality of the repros. They look awesome but maybe there was a running assembly line change by 1972???

The muffler hanger definitely uses a different rubber bushing and method of containment for it. Smaller bushing with bent retaining tabs on the repro vs. extended shoulders on the original bushing. As for the rear pipe hanger, the triangular support bracing is shorter on the repro but interestingly enough it uses the same type of bushing as the reproduction muffler hanger (with tabs.)