American GMC prewar and war vintage trucks got a number stamped on the frame on the right side just above the front axle. The American number would start out like CC101 for a 1/2 ton short bed, CC102 for a 1/2 ton long bed, CC152 for a 3/4 ton and CC252 or CC253 for a 1 ton.

Going through your pictures, I notice your truck is right hand drive. Pretty cool! I also noticed the firewall is fairly smooth without any ribbing stamped into it. This leads me to believe there was work done to smooth out the firewall, or your truck is using a 1940 cab. The 1940 cab is about 2 inches shorter than a 41-47.1 cab. Some parts interchange between 1939-1947 like doors, seats, windshields. **Edit** The firewall doesn't have the 1940 ribbing either... likely smoothed out.

Last edited by bigbadswingdaddy; 01/28/2012 9:57 AM.