Home » Mecum Florida 2015 – 1970 Ford Mustang Boss 429 Fastback Is #5 Top Earner at $425k » 1970 Ford Mustang Boss 429 Fastback 1970 Ford Mustang Boss 429 Fastback Home » Mecum Florida 2015 – 1970 Ford Mustang Boss 429 Fastback Is #5 Top Earner at $425k » 1970 Ford Mustang Boss 429 Fastback