12/20/2024
The Long-Lost Boss: How a Farmer Unearthed Larry Shinoda’s Legendary 1969 Mustang Prototype
Sometimes, the most incredible automotive treasures are hiding in plain sight.
That’s exactly what happened to John Grafelman, a hardworking farmer from Peoria, Illinois, who unknowingly purchased one of the most important Mustangs in Ford history: Larry Shinoda’s 1969 Boss 302 prototype.
-A Mustang with a Mysterious Past-
John’s love for all things Ford started young. By the early 1980s, he had already heard whispers about a long-lost prototype once owned by the legendary Ford designer, Larry Shinoda.
Known for designing the Boss 302 Mustang and the Corvette split-window coupe, Shinoda’s prototype was rumored to be one of a kind. But finding it seemed like a pipe dream—until John unknowingly stumbled upon it.
In 1976, John spotted an ad in his local newspaper for a 1969 Cobra Jet Mustang. The car was being sold by an elderly owner, who vaguely mentioned it had “some Ford history.” Intrigued, John paid cash and brought the car home. He didn’t know it yet, but this wasn’t just any Mustang—it was the Mustang.
-A Prototype’s Secrets Revealed-
John didn’t realize what he had until he began noticing unique details about his “Cobra Jet.”
One of the first clues was the rear window slats, which stood out as completely different from any production model. "They were so far away from production, they stood out like a sore thumb," John recalls. He also noticed the rear spoiler was larger, sharper, and mounted differently than stock, with pedestals that were closer together and chrome finished. These weren’t modifications—they were one-off, factory-designed features.
Another mystery? The car’s stance. Sitting lower than any standard Mustang, the suspension had clearly been reworked, likely by Kar Kraft, Ford’s experimental shop responsible for prototype and performance models.
-Clues in the Bodywork-
The Mustang’s body also held secrets. The simulated scoops atop the rear quarter panels—standard on Mach 1 Mustangs—were missing. Instead, the quarter panels were smooth. When John inspected closer, he found brazing work, not rivets, suggesting this was a factory modification.
The stripes also raised questions. They resembled the Boss 302 graphics but lacked the “Boss 302” text. These stripes matched photos of Shinoda’s prototype, even down to the hand-applied details.
-Piecing Together History-
John dove into research, consulting books like Mustang Boss 302 by Donald Farr and even speaking with Ford engineers who worked with Shinoda. Piece by piece, he confirmed his Mustang was indeed the legendary prototype. Originally a 428 Cobra Jet Mach 1, the car had been reworked by Shinoda and Kar Kraft into a Boss 302 test mule.
Among the final, chilling discoveries was the LB insignia on the Momo steering wheel. John realized it likely stood for “Larry’s Boss,” much like the “LC” that adorned Shinoda’s personal Corvette.
-A Mustang for the Ages-
For decades, John and his family referred to the car as their "special edition Mustang." It wasn’t until years later that its true identity came to light. Stored safely in a barn, the car remained preserved, waiting for its story to be uncovered.
John now plans to share his piece of Mustang history with the world. The first stop? The Boss Nationals, where the car will be shown in its as-found condition, giving enthusiasts a chance to appreciate its unique features before a full restoration.
From farm fields to national stages, John Grafelman’s discovery of Larry Shinoda’s Boss 302 prototype is a story of passion, persistence, and a little bit of luck. This Mustang wasn’t just lost—it was waiting to be found by someone who truly understood its significance. 🐎💪
