The 1978 Gabriel 400 was a Winston Cup (now Nextel Cup) event held at Michigan International Speedway on June 18, 1978. Cale Yarborough dominated the event, leading 60 of the 200 laps in route to a twelve-second victory on David Pearson. Yarborough expanded his points lead with the win, now 47 markers on Benny Parsons (3rd). Stats