Just a thought. I have seen a common factor with SHO owners that are not pleased with there track times. And its the 2.77 final drive ratio. Those of us with the 13 and up PP have a 3.16 which will make a decent difference. When it was colder in April I had a 1/8 mile times of 8.25, 8.22 and my last run of the night the car hook up good and did a 8.17. With just a LMS 93 V8 tune. Just some food for thought.