[MJN]

Originally Posted by special-K

I was thinking it's a medium duty NAPCO cab & chassis that someone put a pickup bed on. It's heavier than an 8-lug 1t and that could be the 5 & 10 lug that the larger trucks run

Napco axles will have a diff cover- this looks more and more like an International front axle from a M-3-4 1.5 ton (or similar) truck. Like the description in the link says it was made up of post war surplus parts and the smooth axle housing is a match to the International front axles used in the 40's.
http://classiccardb.com/chevrolet/26...-project-.html