1971 1972 10 bolt 8.5 3.23 posi rear end 10 bolt gm 8.5 rear 28 spline bolt in axles 3.23 gm gears g80 reconditioned limited slip posi housing blast primed and painted chasis black pretty clean housing was from a 1971 442 olds cutlass all you need are your brakes and go! $1050.00 jim 330 659 7117