Actually, the battle over 770 was between wabc and KOB, Albequerque.
Rich Wood said;
KOB was involved in a 38-year-long dispute with New York City station WABC (originally WJZ) over the use of the 770 kHz frequency. KOB was moved there from 1030 to make room for WBZ in Boston. While the Federal Communications Commission had requested that WJZ install a directional antenna to allow the stations to interoperate over large areas, the station refused to comply, encroaching on the range KOB was intended to cover.
Only after reaching the U.S. Supreme Court was the issue settled, when the FCC assigned KOB to a new license class. Interestingly KKOB and WABC are now both owned by Citadel since its purchase of ABC Radio was finalized in 2007.