I. Features:

Polished cast aluminum Differential Cover
12 bolt 8.75" (8 3/4") ring gear

II. Compatibility:

Replacement for GM diffrentials
Replacement for Chevy 1/2 Ton 1962-1982
Replacement for GMC 1/2 Ton 1962-1982
Replacement for Chevy Blazer 1/2 Ton Full-Size 1967-1981
Replacement for GMC Jimmy 1/2 Ton Full-Size 1967-1981

Note: Some of the above models were equipped with 10 bolt differentials, Please compare to your existing cover carefully！
Professional installation is highly recommended.