This 1970 Ford Mustang Boss 429 Looks Like a $200K Bargain

This 1970 Ford Mustang Boss 429 Looks Like a $200K Bargain—Until You See the Issues

The Legend of the 429

The Ford Mustang Boss 429 is widely regarded as one of the most extreme first-generation models, alongside the Shelby GT500. Part of that comes from its motorsports roots, with its 429-cubic-inch (7.0-liter) V8 designed to homologate Ford’s NASCAR engine and take on Chrysler’s 426 Hemi.

That racing pedigree, combined with a limited production run of just over 1,350 units, makes the Mustang Boss 429 a highly appealing collector car. One of the 499 examples built for the 1970 model year is now listed on eBay, though the seller notes several issues that may discourage buyers who are not looking for a project.

eBay

A Deal With Caveats

While the seller has the alternator, the car is missing the alternator bracket. The shifter and clutch linkage also appear to be incomplete for the 4-speed manual transmission.

The mileage is listed at around 56,000 miles, but the engine – said to remain stock to factory specifications – has been rebuilt and is currently in its break-in period. The Boss 429 was officially rated at 375 horsepower, though some believe it actually produced over 500 horsepower, with the figure likely understated partly due to factors such as insurance policies that imposed steep surcharges on cars with high power-to-weight ratios.

The transmission and rear end have also been rebuilt, which, in theory, should make the drivetrain less prone to issues while reducing noise and vibration. Of course, that still depends on how well the work was carried out.

Inside, the seats are said to have been reworked as well, which could be a plus for a car that’s over five decades old.

eBay

Worth a Closer Look

Given that this 1970 Ford Mustang Boss 429 has been rebuilt, it’s best to have it inspected before making a purchase, with the car listed at $200,000. The unit is located in Hunlock Creek, Pennsylvania, and said to come with a clean title. That price appears to be on the lower side, as the model typically sells for around $300,000, but more pristine examples can fetch more than double that. The listing ends on May 24, 2026.

The Mustang Boss 429 didn’t have a direct successor, though U.S.-based Revology Cars has released a modern reinterpretation. Its restomod version is powered by a 5.0-liter Coyote V8 producing 710 horsepower, with builds starting at around $395,000.