By 1963, Van Elslander owned seven stores and had taken on some partners, including his brother, Bob Van Elslander, Don Fox and Bob McEachin. The following year, three of those stores were sold off, however Van Elslander expanded the chain in the 1970s and in 1973 the company purchased its headquarters in Warren, Michigan. Around that time, the company had fifteen stores in its chain. In the late 1970s opened several warehouses and a corporate training department. In 1977 the company opened stores outside of Detroit, in Flint and Lansing, Michigan.
In November 1959, Van Dyke made his Broadway debut in The Girls Against the Boys. He then played the lead role of Albert Peterson in Bye Bye Birdie, which ran from April 14, 1960, to October 7, 1961. In a May 2011 interview with Rachael Ray, Van Dyke said that when he auditioned for a smaller part in the show he had no experience as a dancer, and that after he sang his audition song he did an impromptu soft-shoe out of sheer nervousness. Gower Champion, the show's director and choreographer, was watching, and promptly went up on stage to inform Van Dyke he had the lead. An astonished Van Dyke protested that he could not dance, to which Champion replied: "We'll teach you". That musical won four Tony awards including Van Dyke's Best Featured Actor Tony, in 1961. In 1980, Van Dyke appeared as the title role in the first Broadway revival of The Music Man.