Will a 50.75" 8.75 flange to flange axle housing work?

Looking to swap out the 8.25 axle for an 8.75 in my 70 duster. There's a 50.75" flange to flange shortened axle housing that I was looking at, but don't know if that would work. End goal would be to put some offset shackles in the rear but I don't want to do any mini tubs. Looking to go with aftermarket rear wilwood disc brakes. Would I be forced to go with expensive aftermarket offset wheels to counter the shortened axle, or would wheel spacers work? Or is there other options I'm not considering? Or should I save myself the hassle and look for a stock length A body housing? Thanks.