...I see a huge money pit and if you ever finished it, it would be very difficult to sell because the demand is such a small nitch of buyers for something like this. If I wanted a cannonball, I would look for one that is much more complete and use this one for parts.
I agree.
That said a cannonball with a 4-71 is not a common truck, I think more of them had a 6-71.
Several years ago I was seriously interested in buying one.. then reality struck. I like them but decided a less than useful truck is not where I need to spend lots of money. I suppose though if I happen to find lots and lots of money I'd still like a cannonball one day.
It'd be nice if you can save the truck but by no means will it be easy or cheap. It may very well be better as a parts truck and look for a good one to restore.
Grigg