Engine compartment room is the same for 1/2 ton up to 2 ton trucks. The radiator is mounted in the very same spot and so is the cab. You can bolt an entire big or small truck cab and nose on the other's frame.

•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-