This may have been posted before, but there is a great tool research website called Alloy Artifacts. I did a search within the site (the link below) and found many unique tools that were made to accommodate the model t.
Worth a look.
http://www.google.com/search?q=model+t&sitesearch=home.comcast.net%2F%7Ealloy-ar tifacts
Here is an example of a socket wrench according to the website that was designed to accommodate the 4th main.
Vince m
And a special socket set for ford cars
Now this would be great to have. Its to keep the engine pan nuts from spinning when tightening or loosening the bolts.
Vince m