Wyobolter...sorry to butt in.

If you fix areas of the cab to it's original state with the doors fitting well,you can safely remove the cab without any extra support.
Just be sure to place it on a 'dolly' that replicates the original cab to chassis locations.

1950 Chevy Advance Design 3100 in Scotland
In the Stovebolt Gallery
More pix on Flickr.
I've definately got this truck thing in my blood ... my DNA sequence has torque settings
"Of all the small nations of this earth,perhaps only the ancient Greeks surpass the Scots in their contribution to mankind" Winston Churchill.