 In 1978 the station rebranded as "Rock 99" with a format change to CHR ("Top 40") and began competing with WKBO AM 1230 and WQXA-FM Q-106 (in York, PA).In 1981, the format was changed to adult contemporary and the branding to "WSFM-99", then "Sunny 99-FM".In 1987, it switched back its format to CHR, branded as "99 HIT-FM" with the WHIT call sign.