10" rear backing plates??

Jimacuda said
Measure the offset of what you have...
That should narrow it down.
Stock axles or aftermarket?
Does the drum fit on the center register and into the edge of the backing plate?
Something is amiss...

Thanks for helping Jim,,,,
I measured offset,, 2" I do believe.
yes 10" drum fits the center and edge of backing plate.
The rear 8 3/4 housing I believe has been shortened to A body spec;s,,, it is 43" in width.
and is SBP. Drum is off 7 1/4 rear end that was removed from Cuda.
8 3/4 rear end is installed,,,, but as you know can't match any shoes? 2'' do not fit or 1'' and 3/4?
axles where in the rear end with No taper when purchased.