Is anybody out there using there old fords at the tractor pulls? If so what are you using. A friend of mine pulled with his NAA last week. It pulled about the same as a farmall H. He's got too much money tied up in the NAA restore and the rears aren't that strong on that model so he is looking for a 600 model to pull with. Maybe a 621 with no hydraulics and no 3pt hopefully to drop down a class. Any input might help.