For all its speed and centrifugal force, all its peril and push-the-envelope ingenuity, stock-car racing for decades subsisted on its array of characters. Guys named Fonty and Fireball, the Intimidator and the King, Foyt and France. They were an ensemble of ruffians and renegades, booze runners and barrier crashers, united by a critical common denominator. All were mavericks. Now, their …