[Tom Goldman]

One thing often overlooked when a car is inconsistent on the stop is front end toe and rear axle being square in the chassis.
If toe is excessive or the rear axle is even slightly crooked, the car will roll differently as the track conditions change during the day, i.e. , slower 60' after the track has been sprayed or dragged and faster 60's when the track has been run in.
Does your car have motor plates or stock mounts ? either way don't overlook chassis flex or engine limiter problems.