GM12P-390

Fits the following :

Buick Wildcat 1964-1972

Chevrolet Bel Air 1965-1972

Chevrolet Biscayne 1964-1972

Chevrolet Camaro 1967-1972

Chevrolet Caprice 1965-1970

Chevrolet Chevelle 1964-1972

Chevrolet Chevy II 1964-1968

Chevrolet El Camino 1964-1972

Chevrolet Impala 1965-1972

Chevrolet Malibu 1964-1972

Chevrolet Monte Carlo 1964-1972

Chevrolet Nomad 1969-1972

Chevrolet Nova 1969-1972

Oldsmobile F85 1968-1970

Pontiac Firebird 1967-1972

Pontiac Grand Prix 1965-1972

Pontiac GTO 1965-1972

Ring and pinion

12 bolt rear cover

3.90 ratio

Case Change: 3.07- 3.73/ 3.90-up

Note: 12 bolt CARS only!