I know you probably do not want to do this but you could put a NOS kit on it and spray 50-75 shot on it and get your 10.90. Then you would not have to change your gear ratio or any of the other things you may have to do to get where you want. You will still be as street friendly as you are now. I am thinking about doing that to mine to run in our 6.00 class at my local 1/8 mile track.It would be the easiest solution. You could put a NOS timer on it to dial in your e.t.