By definition, “Mach 1” is the speed of sound, which comes out to 767 miles per hour. There are aircraft that can go faster than that, and when such a thing happens, the “sound barrier” is broken. Due to a pressure difference created between the front and rear of the aircraft, there is a shock wave that creates a sonic boom. Think a Mustang is capable of hitting such speeds? Let’s look into it and find out.

The Pick of the Day is a 1969 Ford Mustang Mach 1 listed for sale on ClassicCars.com by a private seller in Renton, Washington. (Click the link to view the listing)

“This head-turner originally came with a 351cid Windsor 2V with the FMX transmission but was swapped to a built 1972 351cid Cleveland 2V with a C6 automatic transmission,” the seller states. “Upgrades include a mild cam, a four-barrel intake manifold, headers, exhaust, MSD ignition, a Pro Billet distributor, coil, lightweight pulleys, and more. It makes an estimated 400 horsepower.”

That is a hefty powerplant for this pony car. The Mach 1 model was created by Ford as an evolution of the first-generation Mustang which became widely popular in the mid-1960s. The Mach 1 name included a performance-oriented option package that was only available in a fastback (or “SportsRoof”) body style. Many options were available for the Mach 1 in terms of powertrain and transmission combinations, and all were equipped with upgraded suspensions to some degree.

The seller states that the interior of this Mach 1 has undergone a recent refurbishment which included replacement of the dash, Custom Autosound stereo, quartz clock, heater core, and even the seat belts. Additionally, the car received new Magnum 500 wheels and BFGoodrich Radial T/A tires.

Incidentally, Ford has again tried marketing Mustangs under the “Mach” naming conventions, including the latest which is a Mach “E” all-electric crossover. The use of this phrasing created a lot of controversy when it first launched. The ironic reality is, the electric Mach E may actually get closer to “mach” speeds than a 1969 Mach 1 would. Which version would you rather drive at triple digit speeds?

The asking price is $59,000 or best offer for this Mach 1.

To view this listing on ClassicCars.com, see Pick of the Day.