This differential is used in passenger cars (1965-1972) and has a 12 bolt differential cover with a 8.78" ring gear that also has 12 bolts and it uses 30 spline c-clip axles.
This differential is used in 1/2 ton trucks (1963-1982) and has a 12 bolt differential cover with a 8.78" ring gear diameter and uses 30 spline c-clip axles.
This differential is used in 1/2 ton trucks (Drop Out) and has a 3rd member that drops out the front and comes stock with 17 spline c-clip axles. (30 spline axles are available as an upgrade with new internals)
GM 9.25 IFS Master Rebuild Kit-Revolution Gear & Axle GM 9.25 IFS Master Overhaul Kit comes with all the necessary parts to re-Bearing your differential