Is a 7.25 worth anything?

I had a 7 1/4" in my '71 Duster. It had a 318, 4bbl carb, a performance cam, performer intake. I did my fair share of burnouts with that car, even left 2 tread marks--sure grip rear-end?? Never had a single problem. I know they are weak, but not as bad as some people claim. I would hold onto it.