I have come across this website that has listings of an enormous number of CMP vehicle serial numbers from 1940 - 45. These numbers cover engine, chassis, build date, basically all you may need to discover the build date of your vehicle or engine. This is an invaluable source of detail information. These are the Canadian serial numbers that relate to the Chevrolet built vehicles.
You will have to scroll down the page till you get to the heading - Canadian Military Pattern Trucks 1940 - 1945. These listings cover all models from C8, C15, C15A, C30S, C60S, C60L, C-GT, Anti Tank Portee, C60X etc.
http://hotrod.gregwapling.com/chev-t...dian-chev.html