What newer year Ford truck frame other than 1953 through 1956 will the body of a 1955 F100 fit on?
The body of a 1955 Ford F100 will not fit on any newer Ford truck frame without significant and extensive modification. The frame dimensions, suspension points, and body mounts are completely different between the 1953-1956 trucks and all subsequent Ford truck models. The differences are far too substantial for a simple swap.