Its been a while since I looked at this but the Ford Green Book (seemingly published in the late 1940s) gave direction to service
and for parts of the Ford Truck Line.
https://www.amazon.com/1928-1948-Gre.../dp/B00MMTALB0
Somewhere on the 'net (HAMB?) is a pdf of the Green Book.
I think most everyone here has covered what I learned in attempting to put a Warford Overdrive behind that Borg-Warner 4 speed 26K mile 1930 AA chassis. The adaptation of the 4 speed tranny to the automobile was similar, was done by Ford in the factory, and was not perfect - as in the 1" may have to be made up by "if it won't fit - force it!"
My Warford was not installed, but sold along with the rolling chassis/engine to a buyer from Texas.
Joe K