This is a Buick T-Type 3:42 posi rearend , it is the 8.5 heavy duty type used in the 442 Olds , it has been media blasted and primed and painted , new bearings and posi clutches , new axle bearings and seals , oem ring and pinion , new fluids , this is backing plate to backing plate , housing has some pitting but it will not affect how this rearend works . Axles are not pitted or worn on the bearing surfaces . I will be at the Dick Miller race so i can deliver to the track if money is up front . Asking $1150 . I am located in Hebron Illinois if you want to pick it up here .