Willingham closed in 1970 when Bibb County schools were consolidated, and Henderson moved to Mount de Sales, a private Catholic school in Macon. He assisted the football team there and also became head baseball coach, leading Mount de Sales to state titles in that sport.
In 1973, Henderson moved to Clarke Central, where he would build a Georgia football powerhouse that would last decades. Clarke had opened in 1970 as merger of Athens and Burney-Harris high schools. Clarke’s football program struggled with integration, and the Gladiators finished 1-9 in 1972, just three years after Athens High had won a state title.
Henderson rallied the school and community together, and in just four seasons, the city had a championship again. The 1977 team went 14-0 and defeated Buck Belue-led Valdosta 16-14 for the title. In 1979, Clarke went undefeated again, beating Tift County 20-10 for the championship. Clarke won the title for a third time in 1985, again finishing 15-0.
Henderson’s Clarke Central teams would win 11 region titles and play for a state championship seven times. Henderson coached 42 first-team all-state players at Clarke and Willingham. Some of his more notable players included Jim Bob Harris, Karey Johnson, Chris Morocco, Derek Dooley, Robbie Kamerschen, John Kasay, Chuck Smith, Adrian Jarrell and David Perno.
Henderson retired in 1996 because of an illness that left him deaf in one ear and gave him occasional bouts of vertigo. Henderson remained active in the Athens community in retirement. He founded the Athens Athletic Hal of Fame in 2000. In 2005, he was given the Bill Hartman Award, the highest honor accorded to a former University of Georgia student-athlete.
Funeral arrangements have not been announced.