Welcome to the Stovebolt!
Those pictures don't make it easy...
Based on the location of the spare tire I'm thinking its a long wheelbase, and therefore probably a 3/4-ton. But that's just a guess.
Check for a serial number plate on the cowl under the hood. I don't recall if its on the drivers or passenger side on one of those.
Is the passenger door missing teh lower skin, or is it just the way the light is hitting it?
I see you're from Belgium. You might post again asking for help from someone in Wisconsin who might be able to go look at it for you.
