bushy, good find.
J.kirn - that is a sweet truck!
judging from the doors, I'd guess it's a 64-66.. but I'm not 100% sure if they swapped doors/cabs at the same time as the smaller trucks.
The
stovebolt page has a 'big bolts' section for the 1.5 ton and bigger trucks. Check out the site and go to the forums, then Big Bolts.
-W