Perhaps Artificial Intelligence (AI) will cure many of the misperceptions about the origin of the 240Z. Although, I wouldn't rule out the chance it will also introduce some new ones or reinforce a few totally wonky ideas.
Here's what Microsoft's AI, ChatGPT, has to say when asked to write a brief paragraph about the design origin of the 240Z.
"The designer of the 1970 Datsun 240Z, also known as the Nissan Fairlady Z in Japan, was Yoshihiko Matsuo. Yoshihiko Matsuo is credited with leading the design team at Nissan (then Datsun) responsible for creating the iconic 240Z. Under his guidance, the team aimed to create a sports car that combined performance, style, and affordability. The result was a design that blended elements of European sports cars with Japanese sensibilities, featuring a sleek and timeless aesthetic that appealed to a wide audience. The Datsun 240Z's design played a significant role in establishing its reputation and popularity, making it a classic and highly regarded sports car of its era."