A note about the '57 3200, there are two different versions of the 3200 for that year. The early '57 used the 90" bed, same as the '55/'56. The late version has the 96" bed, which carried on to the last Stepsides in '87. IIRC, the late version has an extension bolted to the frame to make up for the extra length. Same changes go for the 3600, which used the same chassis and bed as the 3200.
