Hey Tibbs, here are the gears you're looking for I think:
2.750, 1.800, 1.300, 1.000, .800, final 3.980, auto 6. gets you to 160mph at gvs, still a little shy of pressing to the end of the streight, but I was 8 seconds ahead at the end of the streight on lap two. Think I set final to around 4.6 then set auto to 6 and adjusted the rest.
What ever race your having tire ware problems with just lower downforce by 5 tics front and back, maybe more on the end that wares quicker, or change brake balance.

to Tibbs for all his great tunes.