Gordon dreaming of eighth Martinsville victory

If last week's visit to the newly repaved Kansas track was a trip to the "unknown" for Jeff Gordon, this weekend's trip is one to very familiar territory.   In 39 starts at Martinsville Speedway, Gordon has seven victories, seven poles, 25 top-fives, 31 top-10's and 3,423 laps led - all tops among active drivers at the 0.526-mile track. A lot has changed during Gordon's 20 years in NASCAR's premier series, the least of which is Martinsville.   "At the intermediate tracks, we're skewing the rear ends now and doing all sorts of crazy things trying to push the limits for aerodynamics," said Gordon, who will drive the No. 24 Pepsi Max Chevrolet during Sunday's Tums Fast Relief 500. "For whatever reason, things have changed the least amount here when you think of aerodynamics, the things that we are doing to these cars, the tires and the track conditions.   "That allows an old school guy like me to go to a place like Martinsville,...