GM used the "corporate" 10 bolt 8.5 inch diff in full size and smaller Chevys, Buicks, Olds, Pontiac, 4wd Jimmy and blazer, bronco, camaro, Z28, firebird, K1500 and K2500 pickups and 1/2 and 3/4 ton pickups.
They replaced the 8.2 inch about 1970, and continued to use 8.5 10 bolt to late...