Although their line-up changed considerably over the years, founding member Franco Fabbri remained with the group for its entire duration.

After some line-up changes Stormy Six switched to left-wing/protest folk rock and their first three albums, recorded in the late 1960s and early 1970s, reflect this style.

Stormy Six's exposure to and collaboration with foreign artists began in 1975 when English avant-rock group Henry Cow first toured Italy.

Later, in 1978, Henry Cow invited Stormy Six and three other European groups to perform at a Rock in Opposition (RIO) festival in London.

In July 1983 three of the former Stormy Six members (Franco Fabbri, Umberto Fiori and Pino Martini) collaborated with German avant-rock group Cassiber (Chris Cutler from Henry Cow, Heiner Goebbels and Alfred Harth) for a public workshop and recording project at the Cantiere Internazionale d'Arte of Montepulciano.