Honestly I think you're going to be disappointed at the value. It's not going to be worth much. Is it of historical value to a museum? Sure, but only if the museum gets it for free or for a token amount. Is it of value to a hot rodder? Sure, but only if they get it for next to nothing, because they're going to strip the cab off and put it on a Ford Super Duty frame with a 24-valve Cummins and a 6-speed transmission, sending the rest to scrap.
You should see the theme that's developing: People will be interested in it, but ONLY if they can get their hands on it for cheap. Finding someone to pay you good money for it is going to be difficult.
Probably the most value it would have is as the subject of a "Will it run and drive?" Youtube video for an established Youtube personality such as Vice Grip Garage. But again, they're not going to want to pay much for the vehicle.
My recommendation is, have fun with it, or pass it on to someone else who will have fun with it. I assume you took it as "payment" for helping clear out the barn. Figure out what you've got into it for time, hauling, etc., add a couple hundred dollars for wiggle room, and ask that much. You can help its value by cleaning it off, cleaning it out, and getting it on some round tires. I think standard 20" dayton style rims will fit that, and you can find 20" tires on rims that hold air cheap or free. I see them on farm auctions all the time, and they are often marked NSD.