Model-T snowmobile hacks

COOP says:

29969 LgFolks (in the 1920s and 1930s) could mail-order bolt-on kits to change their old model T into a snowmobile! It was a pretty simple conversion, with an extra rear axle and treads in the back, and skis bolted on in place of the front wheels. As a hot rodder, I've always harbored a secret urge to build one of these beasts!

Link and Link

UPDATE: Hemmings Motor News editor Daniel Strohl writes:

 Wp-Content Uploads 2006 12 Novasnowmobile03 Resized
We'd mentioned Model T snowmobiles a couple weeks ago at the Hemmings Auto Blogs. The Model T Ford Club of America does have a chapter devoted specifically to those snowmobiles, and we will attend the chapter's annual meeting in a couple of weeks at Lake George, NY, and have coverage at the blog.

Oh, and the Model Ts weren't the last automobiles converted to snowmobile
duty either, though successors were usually one-offs, such as the Chevrolet
Nova-based sled
(seen here) and the converted Nash Metropolitan.