This is a low miles complete GM 10 Bolt/series 3 (late 1980's) 8.5 inch rear leaf spring differential pulled from my 1989 Chevy G20 Custom Conversion Van. Originally this was a 3.42 open carrier that I completely rebuilt and upgraded to a 3.73 Eaton high pressure Posi Traction unit. At the time of rebuild I installed the new Eaton Posi, Richmond 3.73 ring and pinion, all new carrier, axle, and pinion bearings, new axle and pinion seals, GM fluid with additive, new brake shoes, wheel brake cylinders, and drums.
This unit is 60 inches wide backing plate to backing plate and has less than 10K miles on it since it was rebuilt in 2011 and has not been in use since late Sept. 2012. I removed it from the Van this past December 2017. The brake lines and parking brake cables have not been cut and are intact. To the best of my knowledge this is a direct bolt in for '79-2008 GM Trucks and Vans equipped with leaf springs. I'm selling it complete, local pickup, $1200. Leave a message for Kenn at 423-257-3139 and I will return your call.