Yes dually had dana 70, most with a powerlock and 4.88. Vin actually tells t90 (13) in the middle vs. T98 has a (15) in the middle of the number. They are two piece rims that are NOT a classic split rim. The rims are the same as a 62-64 F-350.
Short bed is a FC-150. F-134. Wide track 58 to 64 had dana 44 front and rear almost exclusively 5.38 gears.
Early (1957) FC150’s were “narrow track” versions with the same 48” track as the CJ5. Willys redesigned the 1958-up models to have a 57” track. Yes, these were D44’s up front.