This is my m923 pulling the sled at the truck pulls. I pulled 244 ft with the sled set up for the Pro Modified pullers. A full pull is 300 ft and most of the Pro's were in the 195 to 235 ft range. I don't think I did to bad. I ran 6X6 low and just set the Allison in 2nd and let the trans do it's job. The small surge near the end is when it down shifted to 1st. The thumbnail is side ways but the video isn't. Enjoy.
https://www.youtube.com/watch?v=cZX51ZRmDzw
https://www.youtube.com/watch?v=cZX51ZRmDzw