I think suspension is what keeps most 725-750 rwhp Vipers from dropping into the single digits. I had TNT put adjustable shocks on the front of mine. They believe I could go faster if I lowered the rear. Having the shocks is only part of the answer. Knowing what shock settings to use and the correct spring adjustments will get you where you want to be. That's probably 1.47 or less 60' times for 9's.