[4] The group was discovered performing at the Purple Porpoise in Daytona Beach by talent manager Alan Diggs, who was affiliated with the Lowery organization in Atlanta.

Throughout the next few years, the group released four albums and a slew of Top 40 hits, including "Spooky", "Stormy", and "Traces".

[1] In 2001, Yost underwent successful throat surgery for a condition that had severely impaired his singing voice, bringing him back to touring under the Classics IV name.

To assist Yost and his wife with their medical bills, a benefit concert was held on March 25, 2007, at Rhino's Live in Cincinnati.

Among the artists performing that day were Denny Laine of the Moody Blues and Wings, Chuck Negron of Three Dog Night, Ian Mitchell of Bay City Rollers, Pat Upton of Spiral Starecase, Dave Somerville, the Skyliners, Buzz Cason, Carl Dobkins Jr., Mark Volman of the Turtles, and The Robby Campbell Trio.

The concert did not significantly benefit Yost or his wife financially as hoped; expenses far exceeded the money raised, leaving the event in the red.

[7][2] On December 7, 2008, coinciding with the 40th anniversary of the entrance of "Stormy" into the Hot 100's Top 10, Yost died from respiratory failure at the age of 65.