That's who I used. Jason is very easy to work with. I also used all Goerend parts and am very pleased with them. The trans has held up to my abuse pulling heavy with no problems.I have found this http://www.transmissiontuner.com/Allison-Swap.html
It looks like a simple drop in solution but I would like some feedback from those who have played with Allison transmissions or even used this set up? seems to shift well on the video of the telemetry.