George "Napco Man" has/had a 54 NAPCO 2 ton, the same kit in that truck from new could have been, and I'm sure was on occasion, bought to put in an earlier year AD truck. George has installed his gear from the 54 in a couple year older 2 ton.

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-