8 3/4 build questions

I have gathered the parts for my dream 8.75, and paid dear $$ along the way:

-Original-style housing (not the weird moser 875 "thing" as I call it)
-Eaton tru-trac
-Iron 489 case
-Solid sleeve "crush-sleeve eliminator"
-Brand new gears (NOS 3.23's from 1971)
-Moser alloy race axles w/ green bearinngs
-11x2 B/C-body drums (possibly going to add 91 dakota 13/16" wheel cyl.)

The tru-trac is the one piece I couldn't live without, followed by the 489 solid, then the Moser axles.

The case hasn't been assembled so I'm stuck with 741 open 3.55's at the moment. Really looking forward to the piece of mind of the 489 for the rest of the car's life.

I have always felt that the differential isn't a place to skimp if you beat your car like us Washington Savage's do, but my friends have the luxury of a never-ending amount of 10-bolt chevy's in existence. Good-used-cheap 8.75 cases are getting hard to come by; if they're cheap they're usually toast around here... might as well build a righteous 489 and be done.