Junk yard finds

Shock plates were long gone. Got a pair off ebay today for $65 free shipping. Got the rear all torn down and cleaned today. No Lincoln locker... A true 1970 limited slip. Axle seals still have pentastars and no rtv on the pumpkin. I'm guessing It's never been open or has been dealer serviced. I plain to add a drain plug and crush sleeve eliminater along with green bearings. Anyone have any insight on b body 8 3/4 in an a body E brake cable? The b body ones were cut and don't know what will work.