I have a couple of 10 bolt 8.5 rear prebuilt and ready to go- 1.) 10 bolt 8.5 housing 71 72 media blasted primed and painted (last 4 pictures) New 3.42 gears New bearings and seals Gm Posi unit reconditioned Stock GM axles backing plates included 1250.00 2.) 10 bolt 8.5 housing 71 72 media blasted primed and painted (first 4 pictures) NEW 3.73 gears New bearing and seals Eaton aftermarket posi unit Stock GM axles Backing plates included 1350.00 Jim JD 330 990 8155