I just finished rebuilding the seven tooth for my 1929 Tudor. I was able to get all of the parts needed new, except the worm on the steering wheel shaft. I had to reuse my old worm which wasn't too bad. I also had to use my lathe to turn down the end of the steering wheel shaft to true again. I guess that they all need it. Then I had to ream the new bushing to fit the bottom end of the shaft. All said and done, it needed the rebuild as it also had 4 inches of lost motion in the steering wheel, but next time I would rebuild a two tooth gear box for it. The two tooth has more adjustments to keep the steering gear with in its operating limits. The seven tooth only has two adjustments and that is not enough adjustments. F 100 gear box? It is not necessary to use when the two tooth box has rebuild parts available for it. I rebuilt the two tooth gear box for my 1930 Std Phaeton and it works like a dream.