8 3/4 Rearend Question

I've got a line on 8 3/4 rear end out of a '79 Dodge truck with 3.55's and a sure grip for a great price. Can this be modified to fit under my '72 Duster?

i'm not scared of any fabrication and figured I'd move the springs in anyway. How big of a hassle is it to shorten the rear end and what measuments would be correct for the above Duster? Would I be better off farming out the shortening work to someone with a jig?

Thanks all!