1978 A Year of Changes . . .
Ever since WKBO flipped to Top 40 in 1972, it had always been in "go" mode. Throughout its evolution, it always managed to stay on top and keep growing. In 1978, the growth was slowing down. The first half of 1978, it was business as usual.
January 1, 1978, JAM Productions Positron/Logoset Jingles,
the one made famous by WABC, debuted on WKBO.
JAM Positron
The basic lineup established in 1976 stayed intact, as Dan Steele continued the Morning Show solo. In March, Dan was injured during a KBO basketball game. The resulting injury required surgery and hospitalization.  So Dan broadcast the morning show live from his hospital bed while Chris Andree manned the board back at the studio. Chris continued to run Dan's board after he returned to the studio until his cast was removed. During this time, Andree was behind the console from 2 - 10 AM each day. Also, in the Spring of 1978, "Alien Worlds", a sci-fi serial, aired Sunday nights at 10. The ratings had dipped to a 13.5, down from a 17.7 the previous year. Still very respectable and good for the #2 spot, but nonetheless a drop.

The second half of the year, things began to change. In late July, John St. John, who'd been at the station since 1973, departed for KSD in St. Louis. The "Saint" was always one of the anchors of the station, which left a great void when he left. In August, Mitch McKeever was hired for PM drive.

Mitch McKeever Jingles
Mitch's style was different from St. John's. Most of the time, it sounded like he was just going through the motions. In September, Dan got a partner on the morning show once again as Heidi Kramer was hired from WAHT in Lebanon, PA. Although the show was still officially known as "Steele and Company", many times they simply referred to themselves as "Dan and Heidi".  Dan and Heidi never really clicked as well as Steele and Crissey.
Dan Steele Jingles
Competition was starting to really grow on the FM dial. In addition to Rock 99, WSFM, there was also Q106, WQXA in York. The station had gone live earlier in the year and now boasted Johnny Ringo at night. In December, WQVE, QV93 (now WTPA), the Harrisburg market's first live FM Top Forty signed on. On the AM band, 1460 WCMB had tried Top 40 earlier in the year as "Super" CMB. WFEC returned to Top 40 briefly and then became "Disco 14". Also, WHYL had gone full blown Top 40 as "Y96, AM radio is fun again".

WKBO Lineup Fall 1978. . .
The Music People
Air Force
Dan Steeler and Heidi Kramer 6 - 10 am
Slim Jim Buchanan 10 - 2 pm
Mitch McKeever 2 - 6 pm
"Big" Jim Roberts 6 - 10 pm
Rick Shockley 10 - 2 am
Chris Andree 2 - 6 am
The Weekend Warriors
Fred Adams  Chris Kelly  Greg Allen 
Matt Michaels  Steve Orr  Ken Martin 
Another change in the second half of 1978 was that KBO began doing straight segues, with no jingle between the songs. All through its Top 40 history, jingles were used heavily, particularly during the Musicradio phase. They were used out of every stopset, of which there could be as many 7 per hour. They were used at the quarter hours  and half hour (usually a "best music" jingle  into a gold song). There was a Legal I.D. jingle, Jock Jingle between the first and second songs of the hour, out of news jingles, spot busters, and even custom jingles for American Top 40 and Woody Himmelberger.
Woody Himmelberger Jingles
Woody Himmelberger was a Pennsylvania Dutch character created by Jim Buchanan, who would rip the calendar page each weekday morning. Cold Segues were never a part of KBO up to that point and sounded more than a little strange at first. They were most likely instituted to sound a bit more hip and less cluttered in comparison to the FM competition. Some of the other jingles were eliminated, too including the spot busters and out of news jingles. 
Also, stopsets were consolidated and news was moved from :15 and :45 to :25 and :55. 
In the Fall of 1978, WKBO received national television exposure. The CBS kids news magazine "30 Minutes" that aired on Saturday afternoons, featured Dan Steele as it documented the "win a date win Shaun Cassidy" contest the station had done earlier that year.
Contest Winner Inga George with Shaun Cassidy
The Meltdown of 1979 . . .

Jeff Roteman's WKBO Website