Boss 302/Boss 429 Mustang: THE BOSS -- The "ultimate" Mustangs - The Boss 302 was the class act in Trans Am racing, and the Boss 429 was simply the most overpowered Pony car Ford ever made... and that’s saying something! The Saleen Cars: RACE-BRED -- Saleen started in the eighties, road-racing 5-liter Mustangs. Saleen Mustangs are now the most feared road racers in endurance racing competition, and on the street.