anybody have comparison pics between 8 1/4 and 8 3/4 drum backing plates??

BBP 8 3/4 and BBP 8 1/4 backing plates are the same. As kid mentioned, all of the BBP backing plates are the same and can be used on any rear end, from 7 1/4 all the way up to the Dana.

But small bolt pattern A body 8 3/4 backing plates are different from EVERYTHING, and only work with SBP A body 8 3/4 axles. If you want to run 10x2.5" BBP drums, you have to get BBP axles and backing plates.