Dig this one, I mentioned to Dr. Diff a crazy idea. Though I have not done this one yet I think it can work, but for some reason I'm confused at the moment as to how the axles will bolt on.
if in the market of building a new differential, using either a Dana or 8-3/4 housing, weld on GM housing ends to except GM backing plates and all GM brake hardware. Have the axles flanges be GM bolt pattern and than guest what? GM aluminum drums from your local junked 80's Trans Am, 78-80's Malibu, Monte Carlos' and Camaros.

Moser axles will make any bolt pattern on their axles. I guess a system like the C-clip eliminator kit can work.