10. 1971 Ford Mustang Boss 429
The 1971 Ford Mustang Boss 429 stands out as one of the most formidable Mustangs ever produced. Built to homologate Ford’s massive 429-cubic-inch “semi-hemi” V8 for NASCAR, the Boss 429 is renowned for its brute force and limited availability. Only a select few left the factory, making each example highly sought after by collectors.
At a recent auction, a pristine Boss 429 fetched an impressive $550,000, showcasing its enduring appeal. As highlighted by DuPont Registry, the Boss 429’s combination of rarity, racing roots, and big-block muscle cements its place in muscle car history.