There was no long-bed option for 1947-1955 Chevrolet Advance-Design 1/2 ton pickup trucks. So, there was no short-bed nor a long-bed in those 1/2 ton trucks (those terms are meaningless in those years).
3100 and 3600 trucks came standard with a 3-speed transmission (as posted above). A 4-speed transmission was a factory option (as posted above). The 3800s came standard with a 4-speed.
GMC New Design (47-55) 1/2 ton trucks in those years had a long-bed option in the 1/2 ton trucks (model 102 vs model 100 - in all ND years?).
