According to the inforamtion originally posted on Wikipedia, KFMX was a Minneapolis-St. Paul radio station that was purchased, and the call letters (and format) were moved to 94.5 in Lubbock. Therefore, it would be the same KFMX.
However, someone who must have been embarrassed by this has apparently taken it down. What is there now about KZJK, is this:
"KRSI-FM to KFMX and back
From February 1968 until 1973, KRSI-FM played Top 40 hits and oldies as "Request Radio" , simulcasting with their AM sister station. This was by far the most successful format for both stations, and in Spring 1969, they were the #3 station in the market, behind WCCO and WDGY.
The two stations moved away from oldies and more toward current pop music in 1971. In March 1973 950 AM became the first affiliate of Drake-Chenault’s automated “Great American Country” format, as both stations moved from their location in St. Louis Park to new facilities in Eden Prairie (which today is still home to 950 AM).[1] The FM station broadcast in stereo for the first time and continued with a rock/Top 40 hybrid format, soon changing its call letters to KFMX.
Following that, the FM station went through a succession of different formats and transitions throughout the rest of the decade. For a brief time, they played freeform rock, going up against KQRS-FM. They began playing disco music at night in 1978, soon adopting the format full time and becoming "Disco 104". By this time, the AM station was playing rock/Top 40 as "Musicradio I-95" (featuring a great deal of New Wave music). KFMX gave up disco in February 1980 as the fad faded in popularity, and both stations switched to an adult standards/"Music of Your Life" simulcast, with KFMX becoming KRSI-FM once again."
Link the to full page:
http://en.wikipedia.org/wiki/KZJK
But then, I found this:
http://www.nationmaster.com/encyclopedia/KFMX