The Vehicle Information Kit for the 54 3100 says that the height of the bed floor is 23-3/4" loaded and 27-3/4" unloaded with 600-16 tires on both axles. That should get you close.

It also shows a cab-chassis frame height without a bed at 25-3/4 to the top of the frame.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.