I've been searching for a stovebolt for several years and have found a good candidate. It is a 1949 6400. If I wanted to shorten the wheelbase and put a pickup bed on it how well will a 1 ton bed fit? Is the axle width the same?? Will the larger tires fit under the pickup box? Do the 1/2 and 1 ton parts have some interchange with the 1 1/2 and 2 ton trucks?