Grant Cox . April 20, 2026 . c10 . GRANT COX Save ArticleLogin to save it This ’76 C-10 Stayed in the Family For Justin, his dad Jim helped direct his mind toward building things to go fast or to customize. For many years, Jim was a regular race car driver at the local dirt track on the weekends, but during weekdays Jim worked on painting and restoring autos in his own shop.