Will always wonder why WLS never moved to 94.7. KDWB did, KIIS in LA was 1150/102.7, WSPT moved from 1010 to "Stereo 98" 97.9. Know I've spoken of this in the past. I know WLS was AM 89-FM 95 etc, but why? Money? Ownership?

At the time, it was AM holding onto upper demographics and their FM's skewed younger.
KFYR AM, KYYY FM Y93 vs K-Fire

As a geek, I missed the "Super CFL" TM shotgun.
Music Radio was a copy of WABC NYC.(Never liked it.)
There was KHJ thinking vs WABC thinking.
Stations EVERYWHERE imitated WLS WABC KHJ etc.

In my case, have lived through some great times. Miss old fashioned radio wars. . . even WBBM vs WMAQ!
Programming, counter programming, Spy vs Spy stuff....

Top40 goes through its ups & downs but a few have stayed true to that format. Right now, HotAC and CHR seem undistinguishable, to me.
KTSA AM, KTFM FM
WKRC AM, WKRQ FM Q102
WABB AM, WABB FM
WBIZ AM, WBIZ FM STILL Z100!
KEYN AM, KEYN FM FM would go Classic Hits
KKLS AM, KKLS FM "Double K LS" (used WLS jingle theme!)
KKXL AM, KKXL FM "XL 93" STILL Top40
WAKX AM, WAKX FM
WLXR AM, WLXR FM Went from 1490 to HIT 105! (104.9)
WMEE AM, WMEE FM "the Magic Mee" now HotAC

Might be beating a dead horse, I know, but what could/might have been....

Lots of good stuff (right side of page.)
https://radio.drewdurigan.com/classic-american-top-40-shows/casey-kasem-at40-station-lists/
including some Chicago stuff.

John