as a basis for van conversions. Using the sparsely-equipped Econoline cargo van as a basis, a luxurious interior was fitted, along with extensive customization of the exterior. The 1978 Ford Econoline was MotorTrend's first-ever Truck of the Year. Chassis To increase the versatility of the full-size van line, the Econoline was developed using body-on-frame construction for the first time. In addition to increasing the strength of the chassis, the configuration allowed more commonality with the F-series trucks. As before, the Twin I-Beam front suspension was used. In its new configuration, the engine was moved further forward and lowered relative to the body. The van grew in size: the short-wheelbase configuration was a half inch longer than the previous long-wheelbase chassis; the new long-wheelbase chassis was , the longest wheelbase full-size van sold until 1990. After the 1984 model year, the 124-inch wheelbase Club Wagon passenger van was discontinued, and the 124-inch wheelbase Econoline Cargo Van was discontinued after the 1990 model year, leaving the 138-inch wheelbase as the sole option. In 1982, to increase the fuel economy of the Econoline without a major loss in engine output, Ford introduced the option of a 6.9 L IDI diesel V8 produced by International Harvester; in 1988, this was enlarged to 7.3 L. The diesel V8 engines were available only in Econoline 350s (or Club Wagons sold on the same chassis). The cutaway version was available with the larger (5.8 or 7.5 L) gasoline V8s or the diesel V8. Due to the popularity of automatic transmissions in full-size vans, Ford discontinued all manual transmissions after the 1989 model year. The column-shifted 3-speed departed after 1986, leaving the floor-shifted 4-speed overdrive manual as standard. The four-speed was replaced by a Mazda-sourced 5-speed M5OD for 1988. Body Unlike its predecessors, Ford designed the 1975 Econoline with a "two-box" layout. Similar to the Ford Transit of the time, the configuration moved the engine as far forward as possible and lower in the chassis than in its predecessor; although the hood was nearly twice as long, the hoodline was much lower. A higher degree of parts commonality with the F series made itself known in the bodystyling: the vent windows, taillights, bumpers, and wheels were common items between the two vehicles. During its sixteen-year production run, the exterior of the Econoline/Club Wagon would remain nearly unaltered. In 1978, the Super Van/Super Wagon was introduced; based on the