You've been revving to 9k for 3 years with no problems? That's impressive because I know the rod angle on the 2.3 strokers is absolutely awful. 9.5k is even more impressive. I know Kiggly has taken them to 11k but he also had/has custom crankshafts and other stuff made and specially weighted/balanced just to do that.

I'm curious to know more about your engine build...2.3L 10.5:1 CR sounds intense as is. I'd think you'd be better off with a taller tire than a higher rev limit, even if you are auto, especially if you're not even hitting a 10s pass yet.