The city of Clarkston, Michigan was the site of the Ford Proving Grounds, called Deer Lake Farms. The city isn't very far from me and there is still some remnants of the old buildings and area preserved. A wealthy family owns much of the area now. There is a vintage 16mm movie that was filmed there, featuring "62 New Implements For 1948 " (8N)and we have on DVD in our support list. I'm trying to set up a meeting with the current owners to see what I can learn about the Ford days and if there is much still of interest.