The F-150, along with being Ford’s top-selling product and a key moneymaker, has been the best-selling vehicle in the U.S. for more than 40 years. Last year Ford sold nearly 900,000 F-Series trucks compared to 633,694 sales of Fiat Chrysler Automobiles NV’s Ram pickup and 575,600 sales of General Motors Co.’s Chevrolet Silverado.