'01export, with a stock tune, this thing is a dog with 33s. With the 93 octane "torque" tune, there is a big difference in performance, especially off the line. Downside is you have to use more expensive gas when running that tune. But I also have an 87 octane "mild" tune I can flash in anytime like when going on road trips. It still has all the trans calibration changes and speedo corrections for the larger diameter tires, just not as much power.
My tune was from Bamachips and I'm happy with it. You also might want to check out Henson Performance. James (jah81592) is a member here and a paying vendor. He seems to be alot more accessible when you need changes made to your tune.