Our setup is very close. We run with a little more camber in the front and a little less in the rear. Same caster and toe. Our runs thru the narrows are similar in speed to yours, most of the time. We have run a faster average (140 as the slowest thru the S turns, but in saying that, in May last year we were down to 100 at the S turns, and still averaged 202.8 MPH. I spoke with Jim after his 199 average run in the Monte Carlo, and he indicated he had run about 140. I talked to him after his record run, and didn't share that information. With all this said, at the speeds Jim was running at the radar locations, the math would suggest his speed in the narrows was not much more than his previous run.