Donald,
  Thanks for the reply.  I want to get a carb. rebuild kit in the new week and then while my son is home (he's the muscle) we can give the tracks a go. Yes, they are the half-tracks. I have seen them on tractors from time to time but never on one of thie size of the 770. Should be interesting. I figured it would be interesting to make a set of skis to replace the front wheels for the winter. That was commonly done on the old Model T Fords.
 I will try to put them on as you have suggested. I know I cannot lift them over the tire by hand.
Hope you have a good Christmas.
                  Cal