Here are the practice times.
http://jayski.com/stats/2010/practices/19chi2010prac.htm
If you look at all the JGR cars they ran a ton of laps. They did not improve on there times as practice went along. 5dimes has a ton of match ups. I dont play a ton of match ups. I tend to play one or two. To me the best play on the board is Kurt Bush over Denny Hamlin. The juice is small on this play.
Good Luck and enjoy the race