There isn't any info that pops up with a simple search, but, some very famous people (Smokey Yunick, Mickey Thompson, John Fitch, Betty Skelton) were in the 1959 Mobile Economy Run

The Mobilgas Economy Run: A History of the Long Distance Fuel Efficiency ... By Dave Hermanson
 
https://books.google.com/books?id=vVHmAgAAQBAJ&pg=PA131&lpg=PA131&dq=Los+Angeles+to+Minneapolis+Mobil+Economy+Run&source=bl&ots=sTn9-7u4af&sig=hB8mzqgXK7VgwpkgQh3adXdBpVQ&hl=en&sa=X&ved=0ahUKEwjLkdyS4vbXAhUV9GMKHVWVDdIQ6AEINTAC#v=onepage&q&f=false