The Stovebolt Site Forums The Shop Area Paint and Body Shop Cab height/space

I am attempting to build a 47 3600 chevy truck and I am a little over my head. The truck was in pieces when I got it. I don't have the center shackle setup for the rear of the cab and I fabricating my own mounts. My question is: what is the rear of the cab height from the frame? I am assuming it will make a difference with the front sheet metal alignment and the bed appearance.

Thanks,
Chuck