I remember the AM versions of "When Doves Cry" and "Purple Rain" by Prince being much shorter than the FM versions. They basically cut it off right when the long endings began. Even "Little Red Corvette" had a shorter AM version.
The AM version of "Cum On Feel The Noize" by Quiet Riot deleted the third verse.
"Eyes Without A Face" by Billy Idol also had a shorter AM version.
Radio edits were very much in use in past years. Chicago's "Make Me Smile" was a combination of "Make Me Smile" and "Now More Than Ever" from "Ballet For A Girl In Buchanan" (
sic, she was really from Buckhannon, WV), "Does Anybody Really Know What Time It Is" had the free form piano and part of the introduction deleted, and both "Questions 67 and 68" and "25 or 6 to 4" were chopped up big-time. And the single version of Peter Frampton's "Do You Feel Like We Do" was a whole lot shorter than the album version.