1969 Mustang Boss 429 – 13.60 seconds
Price New: $4,800
Price Now: $600,000
The mythical Mustang Boss 429 is a proper muscle car legend. Ford conceived it in 1969 as a pure racing engine intended for use in NASCAR championships. The Boss 429 featured a totally different engine architecture than the rest of Ford’s big blocks. They made the Boss 429 much wider. It also had semi-Hemi combustion chambers that helped achieve higher revs and better flow inside the head. Ultimately, it produced more power and torque (via Supercars).
With factory ratings of 375 HP, this unit produced over 500 HP and much more in race trim. Ford decided to put this engine into the Mustang, offering a limited production of Boss 429. However, NASCAR decided not to homologate it since they only accepted intermediate and full-size cars. But the Mustang was a pony car. So Ford homologated the Torino Talladega as the body and the Boss 429 as the engine. It participated in the 1969 season with Torinos and Mercury Cyclones powered by Boss 429 engines.