 Complete the following phrase:  Andretti made his Champ Car debut on April 19, 1964 at the New Jersey State fairgrounds in Trenton, New Jersey. He started sixteenth and finished eleventh. Andretti was introduced by his USAC sprint car owner, Rufus Gray, to veteran mechanic Clint Brawner. Brawner was not impressed since sprint car drivers Stan Bowman and Donnie Davis had recently died, and Brawners current driver, Chuck Hulse, had been critically injured. Chris Economaki recommended Andretti to Brawner, so Brawner watched Andretti race at Terre Haute, Indiana. Brawner was convinced that he had found the new driver for his team. The two stayed together for six years. Andretti finished eleventh in the USAC National Championship that season. Andretti won his first championship car race at the Hoosier Grand Prix on a road course at Indianapolis Raceway Park in 1965. His third-place finish at the 