Also look for any sales materials... swap meets, online auction places... some of the vendors sell reprints of some of that material.

Also go check out the Gallery section:

gallery section, 1940's trucks

The Vintage Chevrolet Club of America ( VCCA) is all about stock vehicles, contact them to find out if they have information about the old trucks that is available to their members.

-W

p.s. for parts vendors look under links, then parts.