Does a 1938 1 1/2 ton Chevy truck have a 6 volt system? What engine (4 cylinder?) would one expect to be with this model? Thanks. I recently bought this truck after returning home from wheat harvest in Colorado. Neighboring farm had it and I was more interested in the old combine at the time so I only took a couple pictures of the truck. It was only after getting home I realized I should get the truck too - so I did. Gil