Mercury Cougar Eliminator 1970 – Boss 302 Powered!!

Ford built the Boss 302 engine to satisfy SCCA Trans-Am racing rules, and almost as an afterthought, a handful found their way into the 1970 Mercury Cougar Eliminator. Mercury built just 469 of these cars for the entire model year, with only 323 getting the close-ratio four-speed that made the high-revving engine worth having. Backed by blacked-out styling and a full-length front spoiler, the Boss 302 Eliminator remains one of the rarest, most overlooked performance Cougars Mercury ever built.

Just like a Mustang from the front seats forward, only wrapped in different sheet metal…

Ford built the Boss 302 engine for one reason: to legally race in SCCA Trans-Am. What almost nobody remembers is that the same homologation-special engine also found its way into a small handful of Mercury Cougars, badged as the Eliminator, built in numbers so small that most muscle car fans have never seen one in person. Fewer than 500 were built for the entire model year, and barely two-thirds of those got the close-ratio four-speed that made the combination worth having. Why did Mercury’s version of the Boss 302 stay so obscure while the Mustang variant became a legend?

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Built to Win Races, Not Showrooms

The Boss 302 engine under this Cougar’s hood is the same unit Ford built for the Mustang, rated at 290 horsepower at 5,800 rpm, developed specifically to satisfy SCCA Trans-Am homologation rules rather than to chase street-racing bragging rights.

A Genuinely Rare Combination

Mercury only installed it in 469 Cougars for the entire 1970 model year, and just 323 of those cars were built with the close-ratio four-speed manual that best took advantage of the engine’s high-revving nature, numbers so small that even seasoned muscle car people rarely encounter one.

What Made the Eliminator Package Different

The Eliminator package itself was Mercury’s answer to cars like the Mustang Mach 1, introduced in April 1969 to replace the milder GT as the Cougar’s performance flagship. Blacked-out grilles, a center hood stripe running into a blacked-out scoop, a full-length front chin spoiler, high-back buckets, and an 8,000-rpm tachometer for Boss-equipped cars all signaled that this Cougar meant business.

Why These Cars Are So Hard to Find Today

Because so few were built, and because the Boss 302 combination is the rarest of the Eliminator’s engine options, clean survivors have become serious collector cars, with well-documented examples selling well into six figures in recent years.

A Cougar Built to Race, Not Just Look Fast

Unlike some performance packages that were mostly stripes and badges, the Eliminator’s Boss 302 combination came with genuine race-bred hardware underneath: the same four-bolt-main block, canted-valve cylinder heads, and high-rpm valvetrain Ford engineered purely to survive Trans-Am competition, not just impress buyers on a test drive.

The Collector Market Has Finally Caught Up

For decades, Boss 302 Eliminators lived in the shadow of their Mustang siblings, often selling for a fraction of what a comparable Boss 302 Mustang commanded. That gap has narrowed considerably as collectors have recognized just how few of these Cougars actually exist, turning what was once an overlooked variant into one of the most sought-after Mercury muscle cars of the era.

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