Santa Paula airport was a great place for vintage airplanes, experimental, and homebuilt aircraft in the mid-70s!
Mira Slovak kept his black and white checked bi-plane there.
He used to perform arial stunts in between heats at unlimited hydroplane races, when he raced on the Columbia in the 60s. (they’d helicopter him from the pits to the airport and back)
I'm intrigued. Now I want to read the book 19th LA Inf recommended.