Boss 429 Mustang

1969 Ford Mustang Boss 429 in red, on display indoors. A race engine wearing a Mustang. Ford needed at least 500 street cars to make its 429 legal for NASCAR, so it contracted Kar Kraft in Brighton, Michigan, to build them. The aluminum heads had intake ports big enough to nearly swallow a tennis ball, and Ford called the output a conservative 375 horsepower. The huge hood scoop is the tell, and with fewer than 1,400 built across 1969 and 1970, spotting one is an event.