If you have everything else for the 8.75, just get a C body housing , send it to Moser. They will narrow it, and weld the perches on it for you. They have the specs for stock width, perch width, and perch angle. If you want anything different with any of these just tell em what you want.
This deal I'm checking out sunday is for a COMPLETE axle, minus drums & backing plates. Housing, axles, & 3rd member w/ open 3.23. Just gotta make sure it's proper width and not just a B or E axle mislabeled as an A