LEVEL CROSS, N.C. — Richard Petty is 86 years old now, and his seven NASCAR Cup championships and record 200 wins at the sport’s highest level came long ago. But Petty is still going strong in Level Cross (pop. 3,694), which sits right in the middle between Charlotte and Raleigh. Petty still lives a stone’s throw from the house where he was born, and that house sits right next to the Richard Petty Museum, which houses an incredible amount of his stuff. Nicknamed “The King” and a member of the inaugural class of the NASCAR Hall of Fame, Petty retired from racing in 1992. Long before that he had…