Larry, I have tested the trans in my 70 Dart Swinger. 689 HP Indy headed 440. 4.56 Dana 60HD. Shifting at 6500 on the track. No in car footage as the Go Pro malfunctioned. I don't lift my right foot ever when I race. Trans survived fine. We already ruined an 8 3/4 Ring and pinion in a 69 Dart Stroker Small Block that we were testing in as well. I have in car footage of that, however, there is A LOT of wind noise that over powers the speakers, so its isn't the best, but you can see that I am not lifting. I also have other in car footage in a '75 Dart Sport with a 340 six pack, but for some reason there was no sound on that. I was shifting at 6000 in that not lifting between shifts. Larry, I am confident that you ain't gonna break it. Jamie
