[dwcsr]

In 58 and 59 there is only 31, 32, 36 or 38 no 3100 or 3200 or 3600
31 is short bed 1/2 ton 6.5 ft bed 2 or 4 wd
32 is long bed 1/2 ton 8 ft bed 2 or 4 wd
36 is 3/4 ton also a long bed 8 ft 2 or 4 wd
38 is 1 ton 9 ft bed no fleet sides only step side

fleet sides are not rare long or short, but a 4 x 4 fleet would be in any length bed