An original 2 speed will have a faster ratio than that on the high side and could be an easy swap.

Did you put up any pictures of the work you did on the other truck, I'd like to see more about the front disc brakes, old I'beam and new P-30 spindles if I remember right.

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-