The high-performance engine hit showrooms with 335 horsepower and 440 pound-feet (597 Nm) of torque and turned the Mustang into a proper drag strip runner.
It also remained the nameplate's most potent mill until the introduction of the 429-cubic-inch Boss in 1969 and 429 Super Cobra Jet in 1971, rated at 370 and 375 horsepower, respectively.
The Cobra Jet was a popular option back in the day, with 18,049 Mustangs sold with this engine from 1968 to 1970.
The figure doesn't include the 3,443 units that were fitted into Shelby GT500 cars. The 1969 version is the most common, with 13,261 examples delivered, while the 1968 variant is the scarcest with only 1,299 made.
Most of these rigs left the assembly line as Sportsroof (fastback) models. Only 34 were convertibles, and only 221 were ordered as coupes.
The Acapulco Blue example you see here is one of the latter, and it's actually a one-of-a-kind classic.
The paint and the four-speed manual transmission are the main culprits in reducing the car's production number to only two digits.
Specifically, this coupe is one of only 102 equipped with the four-speed manual and one of just 15 finished in this appealing shade of blue.
According to the Elite Marti report, only five examples got the standard black bucket seats. This car is also the only one to feature the 3.50-ratio rear axle.
But wait, there's more. This Mustang Cobra Jet is an early production model, making it one of the very first ever assembled.
It's among the first vehicles delivered to Tasca Ford (out of a total of 50), the dealership linked to the creation of the Cobra Jet.
Additionally, this Mustang was used as a demo car and remained with the dealership for an entire year.
The coupe was fully restored but remains highly original. It has all the original sheet metal, sports the correct Acapulco Blue colors, and relies on a numbers-matching drivetrain combo.
The sales invoice that comes with the car mentions a "high-performance tuning" operated at Tasca Ford, yet another rear feature.
If you're looking for pedigree, this Mustang has plenty of it. Not only is it one of the most significant rigs related to Tasca Ford, but it's also a rare coupe equipped with even rarer features.
The fact that it's also a Concours-ready restoration is the cherry on top.
The car is available for $135,000 via American Mustangs. Is it a fair sticker? Check it out in the video below, and let me know in the comments section.
