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The F-Series was redesigned for 1953 with a more integrated look. The pickups also acquired their now familiar names: The F-1 now became the F-100, the F-2 now became the F-250, and the F-3 now became the 1 ton F-350. Interior amenities were new, including a dome light, lighter, arm rests, and sun visors. On March 13, 1953, "Ford-O-Matic" automatic transmissions became an option. 1954 saw the introduction of the new 239 CID overhead valve Y-block V8, dubbed "Power King." Canadian models, however, (including the Mercury M-Series), retained the flathead. The inline six was increased in size, and power steering was introduced as an option.
Source: wikipedia.org