I think that 60 Minute Man is/was one of the biggest soul music hits of all time. Even with less radio airplay than these record labels and artists would have wanted, the music was still popular.
When in Jr. and Sr. HS in ‘50s, there was a radio station in Fort Worth (KNOK) that played primarily black R&B/soul music and I was hooked on it! ......Late at night, “Night Train” with DJ Jim Lowe on WRR in Dallas did the same. ...btw, Jim was the ‘voice’ of Big Tex at the Texas State Fair for many, many years. .....Also late at night was the Howling Wolf broadcasting from a powerful transmitter in (or across the border) Del Rio, Texas. Fantastic music from folks like Muddy Waters, Lightnin’ Slim, Jimmy Reed, Bo Diddley, etc.
5-10-15 Hours--Ruth Brown (1952)
Can't Do 60 No More--The Du-Droppers (1953)
Don't Stop, Dan--The Checkers (1954)