Nancy Sinatra sings the song "Your Groovy Self" in this movie. The song was also included in the soundtrack LP, making it the first and only song by another artist to be released on an official Elvis Presley record.
This is the first racing film to give opening credits to actual NASCAR drivers.
Petula Clark was the first choice for the female lead but she turned it down. Annette Funicello was also briefly considered.
Script originally offered to Sonny Bono and Cher, but after their first movie bombed, it was given to Elvis Presley and Nancy Sinatra.