This unit is a rare find for Simplicity & Allis Chalmers tractors. Great unit...just installed new brushes. The youtube videos are the only real use that the new bushes have seen. This model is from an 'RBT' machine ('71-'00), with a front PTO. In the pictures and video it is mounted on a B-110 'FDT' ('64-'70). The broom will attach to each type of machine with no modification, though I have not had it on the later style. It was previously mounted on a 7016. To run on the early style tractor, I simply added a lift chain/cable and an engagement rod. It works great! $850
Feel free with any questions, or to come take a look. I have no problem helping to have it loaded and shipped via a carrier of your choosing.