AVONDALE, Ariz. -- Rodney Childers thought he was going to throw up. The crew chief of Stewart-Haas Racing's new No. 4 team was standing atop his hauler on a cold December day at Charlotte Motor Speedway, preparing for Kevin Harvick to make his first laps in a test that would determine the rules package used for Sprint Cup Series cars. The vehicle Childers had brought was a year old, and he was nervous -- they were either going to be very good or very bad, without much in between. Two laps in, Harvick busted off a lap a tenth of a second faster than anyone had anticipated, and suddenly the nausea abated. More...