Well, not quite unibody, but it is just as bad as you’re thinking. It was still a body-on-frame truck, but the bed sides were welded to the door sills. Owners complained about their doors jamming when their trucks were loaded. On the flip side, people were complaining about their doors opening over train tracks. Rust was another major issue. The unit body configuration was produced from 1961 to 1963, and is a dark spot in F-Series history. It sure looks nice, though.
