The biggest and baddest full-size van in its debut year, 1975, was the Ford E-350 Econoline. Although it was spartanly equipped from the factory, there were many different conversion options available from RV and carriage shops across the country. Today, it's not uncommon to see these Econoline vans outfitted to accommodate families of 8 to 15, carry a variety of tools and machinery, or even completely cut away from the chassis and fitted with a FedEx or U-haul cargo box on the back. The most advantageous feature for the E-350 was the optional diesel engine. Not available on the E-150 or E-250, the E-350 maximized its hauling and towing ability when the Navistar or Power Stroke diesel engine was dropped in. Ford has held the title of market leader with their line of full-sized vans with well over 50% of van owners driving an Econoline. And to keep up this scale, Ford E-350 Econoline parts are often interchangeable with the F-Series. Fun fact: in 1992, Motor Trend magazine awarded a Ford Econoline Club Wagon conversion the Truck of the Year award.