If you dead set on running good stock times its definitly gonna take some time! These cars have garbage gearing, it seems that as long as you can hold your RPMs up high after the launch they run good. If the RPMs drop to low even with a solid 60, the 1/8 miles speed will be slow and so will the run. Good luck man, I actually launched my car at 5000rpms on a sticky track and I let off the gas a bit, and slipped the clutch out and stuck the car for a 1.9+ and ran 12.7 some how, but my best passes have been between 4-4500 out of the hole with 12.60 ets and 1.9-2.0 60s with only mod being headers and 1chambers. I figure at a fast track in great weather I could have 12.4s but my cam will be in VERY soon!