In 1964, he moved to a new label (Baltimore’s Ru-Jac Records) and released “I’m a Lonely Stranger”. When Otis Redding heard this, he asked Conley to record a new version, which was released on Redding’s own fledgling label Jotis Records, as only its second release. Conley met Redding in 1967. Together they rewrote the Sam Cooke song “Yeah Man” into “Sweet Soul Music”, which, at Redding’s insistence, was released on the Atco-distributed label Fame Records, and was recorded at FAME studios in Muscle Shoals, Alabama. It proved to be a massive hit, going to the number two position on the U.S. charts and the Top Ten across much of Europe. “Sweet Soul Music” sold over one million copies, and was awarded a gold disc.
After several years of hits singles in the early 1970s, he relocated to England in 1975, and spent several years in Belgium, settling in Amsterdam (Netherlands) in spring 1977. At the beginning of 1980 he had some major performances as Lee Roberts and the Sweaters in the Ganzenhoef, Paradiso, De Melkweg and the Concertgebouw, and was highly successful. At the end of 1980 he moved to the Dutch town of Ruurlo legally changing his name to Lee Roberts—his middle name and his mother’s maiden name. He promoted new music via his Art-Con Productions company. Amongst the bands he promoted was the heavy metal band Shockwave from The Hague. A live performance on January 8, 1980, featuring Lee Roberts & the Sweaters, was released as an album entitled Soulin’ in 1988.