Shortly after The Ramsey Lewis Trio had a hit with "The ‘In’ Crowd," Eldee Young and Red Holt left and formed the Young-Holt Trio with pianist Don Walker. They had a minor hit in 1966 with "Wack Wack", which reached #40 on the Hot 100. Renaming themselves Young-Holt Unlimited and replacing Walker with Ken Chaney, they recorded the backing instrumental track to Barbara Acklin’s song "Am I The Same Girl" (later covered by Swing Out Sister) and released it as "Soulful Strut" in late 1968. By January 1969 it had risen to #3 and sold a million units, being certified gold by RIAA. Future releases failed to repeat the commercial success, and they disbanded in 1974.