Crew Cab, that explains it. Your'e looking at a short step bed which is 82-1/8 in. in length. It will fit right in if you have 42 in. between the back of the cab and the center of the rear hub. I doubt that you will though. You will have to do some fitting. In the Gallery is a photo of a 64 crew cab with a step bed on it. Look for Rich Sisnero's 64 crew cab. You will see the bed had been shortened considerably.