it's pretty cool how much stuff shows up on the internet, like guys who have been reunited with their 1960s and 70s soap box derby winning cars

Above, Myron Neff won the Logansport Soap Box Derby in 1957, at age 14, and went to Akron for the finals, but the shipping company lost his car after that, and then it recently was discovered by Mike and Frank on American Pickers, and Myron bought it from the current owner

Jack Littleton captured the second Corning Soap Box Derby in 1966, Frank Hamm on the right, was the race director. 

A planned 1972 competition was washed out by the Tropical Storm Agnes flood, and that, combined with the loss of Chevrolet as a national sponsor, contributed to the demise of the Corning race.

https://www.carrollcountycomet.com/articles/local-man-finds-his-old-soap-box-derby-car-after-53-years/

https://www.stargazette.com/story/news/local/2015/05/21/corning-soap-box-derby/27709529/