Ford Mustang 1973 images

1973 was the final year of the original Mustang body before Ford shrank the nameplate down into the Mustang II — and this survivor was built right at that turning point. The big-inch engines that made the Mustang famous were already gone from the order sheet by this point. What was actually under the hood says a lot about how fast the muscle car era was changing.

1973 Ford Mustang 429 CID V8 Automatic

MCF thanks Gateway Classic Cars for the images displayed here.

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By 1973, the writing was already on the wall for the Mustang as the world had known it since 1964’s New York World’s Fair debut. Ford was one model year away from shrinking the pony car down into the Mustang II, and everyone building these cars on the line knew it. So what do you put under the hood of a car that’s living out its last year in its original body — go out with a bang, or quietly accept that the muscle car era was already winding down around it?

The Last Stand of the Original Mustang

1973 closed the book on the first-generation Mustang, the body style that started the entire pony car craze. Emissions regulations and insurance surcharges had already been squeezing horsepower ratings for a couple of years by this point, and this would be the final season before Ford went smaller and more efficient with the Mustang II. That context matters when you’re looking at a car like this one — it’s not just a Mustang, it’s the last of a breed.

What Was Actually Under the Hood in ’73

Here’s the part enthusiasts sometimes get tangled up on: by 1973, the Cleveland 351 four-barrel “Cobra Jet” was the strongest engine Ford offered in the Mustang lineup, rated at 259 horsepower and 292 lb-ft of torque SAE net — the big-inch 428 and Boss 429 engines that defined the late-’60s Mustang were long gone from the order sheet by this point. The base 351 two-barrel made a more modest 173 hp.

A Snapshot of Where the Muscle Car Era Stood

It’s a reminder of how fast the muscle car math changed in just a few years — the same nameplate that once housed a 428 Cobra Jet was, by ’73, doing its best work with a 351. That doesn’t make this car any less worth preserving; if anything, it makes surviving examples like this one a snapshot of exactly where the muscle car era stood right before everything changed.

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