Hi Brent,
Been a while since I have been on. I read where you need some information. I have a 39 chevy 1/2 ton JC shortbed. I can get you those measurements. It is rainy here in the south so it might take me a couple of days to get out there to do it so let me know if you still need them. I can even take a picture with the measurements cause the bed is upside down on another one waiting on me to do something with it.