Glidden retired his undefeated Ford Fairmont in 1979 in favor of a Plymouth Arrow. He opened the season with a victory at the Winternationals, and did not lose a round until June. The streak ended after 14 races and 50 rounds when he fouled in the second round at the Mile-Hile Nationals. He won seven national events, earning the maximum points at four events by setting low e.t., qualifying number one, and setting the top speed at each event. He also earned maximum points in his four divisional events.