In 1969 NASCAR was in the spotlight when talking about selling cars to the everyday customers. Ford decided to put an end to that by putting a Boss 429 racing engine into the most famous Ford vehicle ever, the Mustang. And what happened? Well, in 1969 Ford built 859 units of 1969 Ford Boss 429 Mustang all of them being made by different outside contractors. If you want to own such car today, you will have to set apart 220,000 dollars.