He won the Circuit of Mugello race in 1968 and finished second in the Targa Florio (with Ignazio Giunti) the same year.

Galli's final appearance at Le Mans was in 1970, where he shared an Alfa Romeo T33/3 with Rolf Stommelen.

They did not finish.Galli moved briefly into Formula One in 1970, debuting in the 1970 Italian Grand Prix with a McLaren-Alfa, and had a handful of drives over the next couple of years, finishing 3rd in the non-championship Grand Prix of the Italian Republic at Vallelunga in 1972 for the small Tecno team.

His one shot at the big time came that year when he drove for Ferrari in the 1972 French Grand Prix at Circuit Charade near Clermont-Ferrand.

After half a dozen outings in an uncompetitive car for Frank Williams the following year, Galli announced his retirement.