The military museum I help out with is having a reproduction M1917 tank built. They would also like to have an ambulance to go with their other ww1 displays. Any advise as to where they should start as far as finding a vehicle? They have a pretty good staff of volunteers who can build about anything if they have directions or patterns. They are located in Vincennes, Indiana.
You might start by calling Ron's machine shop in Shandon, Ohio. They have a Model T museum and might know where you could get a suitable 1917 - 1918 chassis for your project.
I just reread the article in the Model T Times about the Model T tanks. It was an old article, quite a few years old. I think it said that there were fifteen tanks built, and two left. One was at the Aberdeen Proving Grounds if I remember what the article said. There were 15,000 tanks ordered but the order was canceled when the war ended before the tanks could be built.
There were two 1918 Model T engines in each tank.