Cylinder heads are an interesting point of comparison between the 351-ci engines, and the 351W heads were optimized for low-rpm torque, instead of high-rpm horsepower. This made the engine a great powerplant for all sorts of intermediates and full size cars, including the Galaxie, LTD, Country Squire, Torino and Thunderbird. The engine pulled double duty in Ford’s Broncos and F-Series trucks, and a tuned version was also made available in the 1968 through ’70 Mustang. Depending on configuration, the engine produced anywhere from 250 hp (SAE net) to a stout 300 hp in the 1995 Cobra R Mustang.