Be sure to make WIDE, slow turns while towing. The way the Model A steering is designed, the sector gear doesn't always return to its neutral center position and allow the front wheels to straighten out after completing a turn, especially a tight one. After making a turn, pull over and ensure that the wheels have straightened themselves out. Otherwise, they'll remain cocked and skid along without you knowing it. Depending upon the size and power of the tow vehicle, you may or may not feel the extra drag. This phenomenon happened to me in the distant past before I decided to remove the pitman arm from the sector gear's shaft and support the now-disconnected drag link in a loose rope "sling" from the frame. Other times I simply removed the drag link from the steering arm ball up front. Tie off the front of the drag link so that it doesn't flop around. Don't forget to put the drag link back over the steering arm ball before driving away!
Marshall