We had a cheater kit too, but never used it at the track. It would have been quite interesting though, it produced quite a kick at around 70 mph on the street with 180 hp jets. I had a 9.5" converter, never checked the stall but I guess it was around 4500-5000. However, it pulled very well even below that and was a real pleasure to drive everywhere. PTC really nailed than one.