Congrats on getting her home, now the fun begins. Once you get into it and under it you'll be able to tell more about the truck s history. Just from the pictures the engine appears to be the most modified part of the project.
Spend some time and clean things up and you will have a better idea of what is original to the truck and what was added later. Record any numbers you find and share them with the site, a lot can be learned from what find
Still a great find, like D.B. said I'm jealous too