The Ferguson TO-35 is an excellent tractor, and is about the same size as the Ford 9N, 8N, and 2N.
The TO-35 has the desirable dual range transmission, giving it 6 forward speeds and 2 reverse speeds, making the tractor much more versatile than the small Fords and many other tractors of the same class. The Continental overhead valve engine is reliable, and has plenty of power. I have a Wagner front loader attached, and a variety of other accessories for the 3 point hitch. The tractor is rugged and reliable.
New tuneup parts and service parts are not easily available, however, and the ones that are available are poor quality Chinese parts that are sometimes defective right out of the box.