1969 Ford Mustang ‘Boss 429’
The ‘Boss 429’ 1969 Ford Mustang was the costliest non-Shelby Mustang Ford offered at the time. The reason came down to the semi-hemi 429 engine that Ford wanted to get into NASCAR. While the car was not built for its screaming starts, it was known for long-haul racing capabilities and smooth handling.
Via: toptenz.net