The early production 1940-march 1942 YP and ZP military trucks had the battery under the floor the same as civilian. I think the change occurred when they went from 25 amp positive ground to 40 amp negative ground. At least that is what the parts manuals indicate.


1941 Chevy 1 1/2-ton WW2 4x4 dump truck
In the Stovebolt Gallery
Lots more pictures