I'm not sure about this swap, if even possible, but I'd look at how the steering box mounts, and the relative location of the front crossmember and radiator support between the two frames.
Also decide if you can use your COE cab riser on the 1 ton frame?

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-