Ford Super Duty engine

The Ford Super Duty engine is a range of V8 engines that Ford Motor Company introduced in 1958 for its medium and heavy trucks, where it replaced the Lincoln Y-block V8 alongside the smaller Ford MEL V8. It is a 90-degree overhead-valve V8 with angled piston decks, flat cylinder heads and crowned pistons that form a wedge-shaped combustion chamber, with a compression ratio of 7.5:1 for all models and typically a governed speed of 3400 rpm. Three sizes were built, 401, 477 and 534 cubic inches (6.6, 7.8 and 8.8 litres), all assembled at the Cleveland Engine Plant #2 in Brook Park, Ohio. Among the largest V8s Ford ever built, they were never used in automobiles but in heavy-duty trucks such as the F-800 and F-900 Super Duty conventionals, and in several Ford C-, N-, H- and L-Series heavy trucks. A marine 534 called the Seamaster was also sold. Use declined towards diesels by the end of the 1970s and Ford withdrew the line in 1981.