I have a auto 2007 Mustang Gt. All I have done is a bama tune, CAI, o/r xpipe and magnaflow axle backs. My car came with 3.31 gears from factory. I took it to the track a few months ago and raced a new 5.0 with a few bolt ons and he ran a 8.4 and I ran a 8.6. What does everyone else run in the...