In the summer of 1957, Petersen photographer Bob D’Olivo rode with a convoy of 251 Jeeps as it crossed Northern California’s infamous Rubicon Trail for what was then the fifth Jeeper’s Jamboree. As it still does today, the ’57 Jamboree convened in Georgetown, a small mining town in the foothills of the Sierra Nevada Mountains.

In 1981, Hot Rod magazine Executive Editor C.J. Baker wrote an in-depth profile of Junior Johnson’s No. 11 “Mountain Dew” Buick Regal, in which Darrell Waltrip won the NASCAR championship that year. This photo opened that story in the November 1981 issue. Johnson is leaning on the race car; the other man in the photo is Gale Banks, posed with a turbocharged V6 engine he built for the Hot Rod project car behind him.