Here's one of the last Sportscope shorts from RKO. It concerns itself with Speed Week. That was a series of car races on Nassau in the Bahamas. There's a fair representation of high-performance cars, a ladies event, but for me the highlight was seeing Carol Shelby, who began a career modifying production cars, most famously with the Ford Mustang, which became the Shelby Cobra. I had the strange experience of riding as a passenger in one of the Dodge Omnis he did in the 1980s. A friend had the Shelby insignias taken off and repainted it so it would look like a standard Omni. He liked to take it out on the highway to run rings around Porssches and the occasional Lotus. That thing almost did wheelies.
This short was already shot and edited when RKO collapsed, and was not seen in theaters until decades after its production.