[David_Hayward (RIP)]

"Rzeppa design Universal Joint and axle shafts as fitted by Ford to the front of 4 x 4 Trucks were interchangeable with the G.M.-used Bendix-Weiss, but Ottawa suggested that both right- and left-assemblies of the same type be fitted rather than mix-and-match" ...in a letter of July 1940 in fact. It is very possible that F30S trucks used GM-McKinnon front axles in 1940 and will check further.