73 duster 17" or 18" wheels ?

So with 2" Mini Tubs and Spring Relocation...

I'm sizing the 18"x11" rears with +33mm Offset for the 8-3/4" Rear End
or 18"x12" rears with +58mm Offset...

I can use a 1/2" to 3/8" Hub Centric spacer while the 7-1/4" Rear end is still in the car.

On the front 18"x9" with +27mm Offset and I should be able to get 275/35/18's on with a little massaging.