Contemplating my next move...

So I have everything set up for my project:

Engine-Check (408 stroker hoping for 500hp)
Tranny-Check (4 speed conversion)


My next move is the rear end. Out of experience, what would my FABO fam reccomend? A new Moser? Re-doing an 8 3/4? All would need to be purchased, and it will mainly be a street driver. Gas milage isn't a huge issue, but I still want to consider it. BTW, its a 71 Duster. Thanks guys.