The sellers were unsure of the year, bill of sale only, needs work, etc. the vin shows up as a 1981, so it might be one of the later chinooks, or it could have had a swap at one point in its life. I'm not quite sure. Still researching these things, as they were always a dream, now it's a reality.
Plans are to swap in the front axle I just pulled out of my 4Runner, swap the rear axle with the axle out of my runner again, I have an r150f and chain drive Tcase in my garage, and a 1uz in my shitbox sc400.
Should be quite the adventure.