Saturday 3rd June 1978

Cale Yarborough started second but dominated in leading all 420 laps of the Music City USA 420 at Nashville Speedway, Tennessee, US. Yarborough, who took over the points lead on the way to his third straight Cup championship, was two laps ahead of runner-up Lennie Pond at the finish. Richard Petty was third, four laps off Yarborough’s blistering pace.