wright - would be interested to know what throttle settings you are running on the esc as well. Like Dan said, if your at 120, another tooth, maybe two (check with a temp gun to be sure, go one at a time).
I ran a 10.5 in stadium truck and really liked it because it was enough power to get me what I wanted but not crazy. Could throw a little boost at it if I needed more straight line speed.
Thank for the comments on what to run this weekend. I will be at the Gallimods Trophy race guy. Don't have a truck to borrow (not into that kinda think, I like my own stuff). Don't know if there will be enough time between classes to fully change the motor. Just feel like running both classes getting some track time.