Milt at Precision of New Hampton.
As much info as you can provide Cam specs, or if you have a dyno sheet that shows your torque curve, gear ratio, (do you come out of a corner in 2nd or 3rd?) axle ratio, tire diameter
I called them 2 weeks ago and they no longer sell to end users due to too many morons wrecking stuff and them having to deal with it (Really nice lady on the phone but that was the gist)