Looking for no BS info on 8 1/4 rears

I'm using an 8-1/4 in my Duster, running low 12s. So far, no major problems.

I'm on my 2nd sure-grip unit, though. The first one was an Auburn, that one lasted like 3 years. The new one is a Dana Spicer.

One of the tubes is starting to twist, I don't think the 8-1/4 is gonna last much longer.

If I had the cash, I'd go with a Strange D60. I think I have a line on an 8-3/4, though, so I may be building one of those over the winter.