Awesome run! Launching at 7500.......COOL!! I have 31 spline trac-loc and it has gone through a few spider gears. This was after a few yrs of use each time with repeated high rpm launches. Not nearly as high as yours though
4,000-5,400. Manual trannys and high rpm launches are hard on rears. Especially when you hook well. I wish I could have seen you run. I think its really cool when you can launch it like that. No mercy !!!!!! Awesome!