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.
The white #6 car that 'Elvis Presley drives is a 1967 Dodge Charger. It appears to be the Cotton Owens team #6, driven in real life by David Pearson.