Melling is the leader in oil pump engineering, prototyping, and production. Melling specializes in several different styles of oil pumps including: Variable Displacement Oil Pumps, Vane Oil Pumps, Cast Iron Oil Pumps, Gerotor Oil Pumps, Aluminum Oil Pumps, Crescent Gear Oil Pumps, and traditional Spur Gear Oil Pumps. Buick, Cadillac, Chevrolet, Oldsmobile, Pontiac - 260,307,350,403,330,394,400,425,455(1959-90).