10 X 2.5 in rear drum brake assemblies for 8.75 diff.

S'cuder said
That's a good start. We still need to know which axles by Moser. Specifically, what is the "standoff" or "brake gap?" They were different on A-Bodies. Moser sells 5 x 4.5" axles in both the A-Body and B-Body brake gap. Also needed is the size of the center register. With this information, we can probably figure out what you need. Don't worry about the bolt pattern of the drums. As long as they fit the backing plate / brake gap / register, the bolt pattern can be redrilled.
If you call Moser, they may be able to tell you what you need.

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Will not hurt to try. Thought this was going to be a slam dunk with everyone's efforts. I sincerely appreciate the comments. 10 X 2.5 was common on E bodies and 4.5 in bolt pattern. Wonder what Moser would do with that request for axles in an A body rear end. When ordering, it is assumed axles are for type housing. In this case, if you order A body housing you get A body axles. Only choice would be 4 or 4.5 bolt pattern.