I am building 10 bolt 8.5 rear that will be the same width as the original and will bolt right in place. Details- drum to drum will be 58"(stock) backing plate to backing plate 52"(stock) spring perch center to center 34 1/2"(stock) shock mounts same as stock upper control arms are the only area will you will have to either modify and make shorter OR you can just buy the double adjustable upper J D Racehas for ythis application and bolt it right in. This rear I have built right now is 1459.00 and includes the upper control arms already! specs for the rear for sale... -10 bolt g-body 8.5 housing narrowed, blasted, primed and painted chassis black. -NEW 3.73 performance yukon gears -New superoir alloy axle shafts -New eaton 8.5 posi unit -New MEGA bearing and seal install kit -NEW Double adjustable upper control Brake package can be added and installed adjusted and ready to bleed and go for 195.00! Yes of course I can ship. I will also be offering a housingf axle package for those wanting to do it yourself. we can make this a 28 30 or 33 spline rear. We will also offer a 12 bolt center section version that will require a different upper control arm but we have them also. Jim upgraded rears 30 33 and 12 bolt will also have the prices increase slightly.