It's possible with some simple fabrication and no body modifications, so not bolt in, but not hard.
The power is better than the gas engines with the potential for lots more. Fuel economy should be around 25 in a 1 ton truck or smaller.
I would not use a 1/2 ton.
The 6BT is just a little to long to make for a simple swap, the 4 cylinder is a better fit.

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-