It sounded Hot AC to me by 1984. I don't remember anything from the 60s but I remember in 1983 hearing either "Jet Airliner" or "Rock'n Me" by Steve Miller in the middle of what sounded like a Top 40 playlist.
Oh, wait, 1987. I didn't even go then. But by 1988 KZQ was rocking pretty hard just before making a switch to rock after 98 Rock went Rhythmic.