I tried top hole bottom hole seemed the car always liked and was more consistent in the bottom hole with zero proload with driver in the car. Air pressure and front shocks were always an issue, looks to me like your time is right on based on the 60 foot although I beleive under the right track conditions wheather etc, there is the odd 1.37 to 9 in there. Looks real good. i had all my changes written down...somewhere lol