A body 8 3/4 rear end complete

I have an a body length 8 3/4. Complete drum to drum. 5x4 1/2” bolt pattern, 3.91 gears. 10x 2 1-2” drums off of b body. I recently did the mini tub and leaf spring relocation and I would now like a shortened rear end so I don’t have to run such a large amount of backspace on the new wheels I am ordering. I would be interested in trading this rear end for one that is already shortened or if that is not possible it will most likely be posted for sale this fall when my car is put away again. $1200 obo Thank you