also, i was able to take my 60's from 1.59 to 1.49 by taking advice on how to correctly do a burnout.
Roll out on the gas to clear the tires of any debris after the burnout, i was letting off too soon, and the tires were balling up, so the 60's were not the greatest.
i also installed 12way adjustable rear shocks, and set the tire pressure to 13psi, make sure you set your tire pressure, then after each pass make sure you recheck the tire pressure.
Get some towels and put them over the slicks to keep the rear tires in the shade, this way you get consistant tire pressure readings, maybe if possible, park it in the shade
BW