Thanks for all the replies and narrowing down the year of the truck.
There is a plate on the firewall that looks like it could be a VIN, we couldn't make out any info other than the Ford logo.
Next time we head out I'll look at the glove box door and see if it reveals more clues.
We still have to get the truck out of the woodlot where it has been sitting for the past 40+ years.

This is what I know of it so far.
It belonged to the owner of the farm it was found on.
He is the second owner.
He purchased it in 1966 from his H.S. science teacher who was the original owner.
That's the extent of the information I have.
We are making plans to meet with gentleman who donated to us to express our thanks, and to gather information of both owners and the history of the truck.

Look for a "Build" thread in the near future.