I'm impressed with your knowledge of music!
In 1966, I was a regular listener of “Boss Radio” 93 KHJ, one of California’s oldest radio stations and the top rock blaster in the Southland at the time. In December of that year, “Hello, Hello” was getting plenty of airplay on KHJ as well as its competitors, KRLA and KFWB.
Hi ChildOfThe60s ((((Hugs))))