Cadillac 425 series V8 engine

The Cadillac 425 series was the smaller derivative of the 472 big block, introduced in 1977 as Cadillac widened its range to include more mid sized cars. It kept the 4.06 inch stroke of the 472 but used a smaller 4.082 inch bore for 425 cubic inches, about 7.0 litres, and was 100 pounds lighter. The L33 four barrel version made 180 horsepower and the L35 with electronic multiport fuel injection 195. In 1980 the L61 de-bored to 368 cubic inches, 6.0 litres, to meet fuel economy rules, and adopted throttle body Digital Fuel Injection. For 1981 the L62 V8-6-4 added Eaton Modulated Displacement cylinder deactivation, which proved unreliable and was often disabled by dealers. The carbureted 368 remained in the Commercial Chassis through 1984, the last traditional cast iron pushrod big block V8 in a production car.