The floor pans,Windshields,and Various Other Misc. parts are interchangable with any 78-81 Little A-Bodies, and 82-88 G-Bodies..
Models included:
Buick Grand National (1982, 1984-1987)
Buick Regal (1978-1987)
Chevrolet El Camino/GMC Caballeros(1978-1987)
Chevrolet Malibu (1978-1983)
Chevrolet Monte Carlo (1978-1988)
Oldsmobile Cutlass Supreme (1982-1988) 1988 RWD model was known as Cutlass Supreme Classic
Oldsmobile Cutlass Calais (1978-1985)
Oldsmobile Cutlass Cruiser (1978-1984)
Oldsmobile Cutlass Salon (1978-1987)
Pontiac Bonneville (1982-1986)
Pontiac Grand Prix (1982-1987)
Pontiac Lemans/Grand LeMans (1978-1981)
Pontiac Grand Am (1978-1980)
Personally Engine wise, if you are going to go to the trouble of replacing/rebuilding one, I will tell you a 455 Poncho with a 200-4R fits nicely(Ok slight shoe horning my apply, but in the cars current condition, it would be much of a deviation from what you already have to do)
