Can I rebuild my 8 3/4" myself?

Is that with dropping the car at a shop and them putting in everything themselves?

Have the rear end dropout rebuilt, then you assemble and put together the rest. But doing the numbers it really adds up.

Put the axles in (w/new bearing installed) yourself. http://www.doctordiff.com/axle-package-stock-length-mopar-5x4-1-2-bolt-pattern.html

And put the dropout center section your self with new axle seals. http://www.doctordiff.com/housing-gasketseal-kit.html

You'll need 10 x 2 1/2 large bolt pattern: backing plates, drums, brake shoes, brake cylinders, brake hardware kit: http://www.doctordiff.com/mopar-10-x-2-1-2-drum-brake-assembly.html Or you can get all that stuff at rockauto or local parts store. Might be cheaper with shipping.

Then take the center section to a rebuilder. Have you tried Sutton Engineering?