The Fifth Generation of the Ford F-Series, commonly known by enthusiasts as the "Bumpside," was introduced for the 1967 model year. The F-350 model series continued with the same platform as the previous Fourth Generation F-Series. Still, they featured sharper styling, a larger cabin, and overall greenhouse improvements with comfort amenities and engine options. The F-350 1-Ton shared most of the same styling and other features as the F-100. However, it featured axles with greater capacity, larger brakes, and 3.89-inch frame section modules. In addition to the Standard Cab (2-Door), a Crewcab (4-door) was available on the F-250 and F-350 platforms. Only the Flareside bed was available, featuring a new 135-in. wheelbase. All series featured Ford's Twin I Beam front suspension. Engines offered were two six-cylinder 240cid, 300cid, and three V8's, 352cid, 360cid, and 390cid. A four-speed manual, three-on-the-tree manual, or a three-speed Cruise-O-Matic automatic transmission were options. Three trim levels were available during the production of the fifth-generation F-series, though the names were changed in 1970. The "Base" trim became the "Custom," and the "Custom Cab" became the "Sport Custom," joining "Ranger" as optional levels of equipment and trim. Late in production, the Ranger trim level was upgraded with the additional "Ranger XLT" option. Styling features on the interior and exterior were changed every year to appeal to a more car-like feel. Ford built the fifth generation until 1972 when they replaced it with the Sixth Generation F-Series.