In this era, the Bollhalder's achieved good results in the Swiss championship but were unable to better Robert Grogg at the time, who dominated the national competition.

[3] Internationally, the situation was similar with the duo always finishing high in the top ten of the competition now renamed European Championship.

There however the duo experienced some success in 1979, being able to outscore Robert Grogg and his passenger Andreas Hüsser and winning the last edition of the European Championship.

[1] The first season of the new World Championship proved unsuccessful for Bollhalder, now with new passenger Ruedi Manser.

[1][3] Emil Bollhalder retired from national and international competition after the end of the 1983 season,[1][3] as did Karl Büsser.