May 22, 1966: The last of Marvin Panch's 17 Grand National victories comes in the World 600 at Charlotte … but he isn't in the car when it takes the checkered flag more than two laps ahead of G.C. Spencer. That honor goes Richard Petty, who drives the final 42 laps. Panch gives up the ride because the seat of his Petty Enterprises Plymouth is rubbing old burns on his back. One other interesting fact, according to DecadesofRacing.net – Panch drives Petty Enterprises' dirt car in the race, which is a year old.