3. 1969 Boss 429 Mustang
Next on the list and taking the number four position is the stunning 1969 Boss 429 Mustang!
The Boss 429 Mustang is one of the rarest and most valued muscle cars to date, with a total number of 859 original Boss 429s made.
Its engine was derived from the Ford 385 engine, and it used four bolt mains, a forged steel crank and forged steel connecting rods.
The Mustang’s body was not wide enough to encompass the massive Boss 429 engine and as a result Ford hired Kar Kraft out of Brighton, MI to modify the existing 428 Cobra Jet and Super Cobra Jet Mach 1 Mustangs to properly fit the new Boss 429 engine.
Production for the Boss 429 Mustang began in 1968 in Brighton, Michigan at Kar-Kraft’s factory, and the cars were transported to this plant directly from the auto maker’s plant, and the work began.
The 1969 Boss 429 Mustang was rated very conservatively at 375 hp, but the actual output was well over 500 horsepower.
