Good info, thanks guys.

Originally Posted by dirtball
All of the early napco conversions had a drivers side differential and used the rockwell 2 lever tcase (not spicer 24

Except the 1.5 ton model? 1.5 ton NAPCO

Quote
Real early 1940-41 GMC and Studebaker trucks used a Timken front drive axle similar to the ultra rare pre war 1930's Chevy, and Dodge (perhaps Federal?) prewar military 4x4 trucks.
Are these weird split axles Timken? 1940 GMC