Remember, KGBS was a daytimer until the mid-70's. When Storer bought KPOP, a 5 kw daytimer, it went to Beautiful Music. They tried a variety of formats, such as Country, personality MOR and the like until the fulltime facility was built and they went Top 40... right when contemporary music formats were all moving to FM.
Storer had a lot of difficulty figuring out what to do with big market AMs, including New York, Detroit, LA, Miami and others. They understood FM so poorly that they sold most of the ones they had in the later 60's.
But they made tons of money with their TV stations, and the stock went way up. What I made on Storer stock and a couple of others paid for my own first radio station in 1964.