TJ-
I have to say I have not thought about this kind of stuff for a long time. It's is interesting to me that I can recall as much as I can. (Maybe the mind isn't gone just yet) Also a nice diversion to the state of radio today. Back in the day it was all about who had the better programmed station. Now, sadly, it's just about the bottom line.
WKFM was a "Stereo Rock" station from, at least 1974 to 1982. I remember listening to them in the mid 70's while in high school. They may have switched to the format earlier. As Dave Bullard said, the early 70's. (Dave knows his stuff; a legend in the Syracuse market.) The station went by "KFM" during this period. I can't remember if 104 or 104.7 was used. They dropped the TM format in the spring of 1982 in favor of live assist top 40 in some dayparts and tapes the rest of the time. Magic 104.7 came about in the mid summer of 82 with live jocks in all dayparts. They had killer Jam Jingles and a real tight sound. The station was locally owned by an attorney in Oswego. In early 1984 it was sold to Wilkes-Schwartz who had a small group of stations in the northeast. It then became "Hit Radio KFM" with some big time jocks on the payroll and yet another major Jam jingle package. Chuck Lakefield of WKBW fame did mornings for awhile. The studios were also moved from Fulton to Syracuse with some swanky digs in a converted firehouse. After awhile it was sold again, I believe, and that is when the AOR or Classic rock format was put in place. I'm not sure of the time exactly but it was probably in the late 80's.
By the way, Rock would have been very acceptable to Broadcasting Magazine/Yearbook for Top 40 stations during the 70's or 80's Stations like WOUR, 94 Rock and 95X would have likely been listed as Progressive Rock or AOR.