Us body source has an article on a glass 47-54 chevy body on an S 10 frame. I dont know if there is enough detail to help you with mounts /dimentions, ect....but it should be "doable". Here is the link.....
http://www.usbody.com/ you will have to dig through the site, they also have a 40 Ford on a ranger chassis & it looks like these early trucks fit pretty well on the "pint sized" truck chassis. Good luck,crazyL