Looking for no BS info on 8 1/4 rears

I've had 4 fail in the last 30 years and they really didn't have a whole lot of power in front of them...They all failed in the same fashon...the caps chattered and the ring and pinion broke ...
I changed the cap bolts on all of them to something 4x better and it still happened.
The very first one I saw I just couldn't believe it happened...It was on a board member here's 68 swinger with a 340 13.0 to one solid 255/265@50Cam Dynamics cam with no tire to really speak of ...just a 70's bias tire.
If you want the NO BS on 8 1/4's ask ifitsgotwheels...he broke one