If You Like Cats,The 1970 Mercury El Gato Concept Car Is For You!

A lime-green Cougar so radically reworked that showgoers assumed it was a new model altogether — that was Mercury’s 1970 El Gato concept, unveiled at back-to-back auto shows before vanishing for good. It borrowed its fastback roofline from a Mustang, swapped its back seat for a European-style cargo shelf, and tested run-flat tire technology that failed spectacularly. Ford’s standard practice of destroying show cars means no one has documented seeing it since 1970. Here’s the story behind Mercury’s strangest concept car.

If You Like Cats,The 1970 Mercury El Gato Concept Car Is For.
Blazing at you with a bold lime green paint job, El Gato was produced as a styling exercise for a futuristic-looking Cougar. It has shaved door handles, a chopped roof, and ultracool three-spoke 16â€³ wheels with new-at-the-time Goodyear Polyglass radials. This cat was cool and way before it’s time!
The front was a merger of styles from the Cougar and GTO and
the front and rear pans were rolled which makes a very advanced looking feature for the time period. This first ever fastback Cougar had LTD-style taillamps and a racing-style gas filler cap.
The El Gato is very elusive as they have never been spotted outside the Auto Show. Ford normally destroyed these concept cars unfortunately.

Front view of a black car on a white background. — Mercury Concept Cat

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Somewhere in a Ford workshop in early 1970, engineers were quietly wrestling with a tire that kept falling off its own rim. It belonged to one of the wildest cars Mercury ever built — a lime-green Cougar so heavily reworked from front to rear that showgoers who saw it assumed it was an entirely new model. Ford’s own marketing called it “One Hot Cat.” It borrowed its rakish fastback roofline from a completely different car, ditched its back seat for a cargo shelf, and rode on some of the strangest wheels Detroit ever tested. Then, almost as quickly as it appeared, it vanished, and no one has documented seeing it since. What happened to it?

A Fastback Stolen From a Mustang

El Gato started life as a production 1970 Mercury Cougar, but you’d never know it from the outside. The windshield was chopped several inches and laid back at a racier angle, giving the car a missile-like profile, while the Cougar’s standard notchback roof was cut away entirely and replaced with a fastback panel borrowed from a 1969-70 Mustang Sportsroof. The nose blended styling cues from both the Cougar and the Pontiac GTO, with rolled front and rear pans that looked advanced for the era, plus LTD-style taillamps and a racing-style gas filler cap out back.

An Interior Built for Weekend Getaways, Not Families

Inside, El Gato leaned all the way into its show-car mission. The cabin was finished in a bright Lemon Yellow vinyl with high-back bucket seats up front, while the rear seat was removed entirely in favor of an elevated cargo shelf where the spare tire was stowed — a layout borrowed straight from European GT cars of the period rather than anything Detroit was building for families.

The Tire Technology That Doomed It

El Gato debuted at the Detroit Auto Show from November 15 to 23, 1969, before reaching the public at the Chicago Auto Show that following February. It also served as an early testbed for the Firestone LXX prototype wheel-and-tire system, which paired a heavily cantilevered tire sidewall with an unusually narrow 3.5-inch alloy wheel in an early attempt at run-flat technology. The tires failed to stay seated on their rims once deflated, and the idea died along with the concept. Ford’s standard practice at the time was to destroy its show cars once their tour ended, and El Gato has never been documented since that 1970 season — it’s presumed to have met the same fate.

Detroit’s Concept Car Circuit in 1969

El Gato’s debut on the 1969-70 auto show circuit came during an era when Detroit’s Big Three treated concept cars primarily as rolling advertisements for styling themes and features that might, or might not, eventually reach production, rather than as previews of confirmed future models. Ford and Mercury built several such show cars each year through the late 1960s and early 1970s, most of them, like El Gato, built on modified production platforms rather than from scratch, since that approach let stylists explore radical looks without the enormous cost of engineering an entirely new chassis.

Why Concept Cars Rarely Survived

Automakers of this era routinely destroyed their show cars once a model’s touring life ended, partly to avoid liability concerns around one-off vehicles that hadn’t gone through the same safety validation as production cars, and partly because many concepts used non-functional or heavily modified mechanical components not intended for regular road use. That destruction policy is why so few genuine 1960s and 1970s concept cars survive today, and why any concept car that does turn up decades later, unlike El Gato, tends to command enormous prices at auction specifically because of that rarity.

The Cougar Platform El Gato Was Built On

Underneath its radically reworked bodywork, El Gato started life as a standard 1970 Mercury Cougar, itself a close mechanical relative of the Ford Mustang built on a stretched version of the same platform with more upscale trim and a smoother ride tuning aimed at a slightly older buyer than Ford’s own pony car targeted. That shared platform gave Mercury’s design studio a strong, proven mechanical foundation to build a show car on top of, even while the bodywork above it barely resembled a production Cougar by the time El Gato reached the show floor.

What El Gato’s Story Says About Lost Concept Cars

El Gato’s disappearance is far from unique among concept cars from this era, but the amount of documentation that survives, including photographs, contemporary magazine coverage, and Ford’s own promotional materials, gives it an unusually well-preserved paper trail for a car nobody has actually seen firsthand in decades. That gap between rich documentation and a genuinely missing physical car makes El Gato a favorite subject among automotive historians who track down and catalog Detroit’s forgotten show cars, even without any hope of the actual vehicle ever resurfacing.

Concept Cars as Corporate Time Capsules

Looking back at a car like El Gato decades later offers a clearer window into what Detroit’s stylists and marketing departments believed buyers wanted in 1970 than most production models from the same year, precisely because a concept car wasn’t constrained by cost targets, safety regulations, or dealer feedback the way an actual showroom model was. That freedom to experiment is exactly why automotive historians treat lost concept cars like El Gato as valuable artifacts even without the physical vehicle surviving, since the documentation alone captures a moment of unfiltered design ambition that production cars from the same era rarely show.

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