1970 Plymouth 426 Hemi ‘Cuda

Plymouth built the 1970 ‘Cuda on an all-new E-body platform designed specifically to house its biggest engines, and dropping in the 426 Street Hemi produced one of the rarest muscle cars Detroit ever made — just 652 examples, split across three transmission choices. Nine outrageous colors and the shaker hood completed the package. Read on to find out what actually separates a genuine numbers-matching Hemi ‘Cuda from a well-built tribute.

Some cars get famous for lap times. This one got famous for how few people ever got to buy it — and for what happens to auction prices when a car that rare also happens to carry the most feared engine Chrysler ever built. In 1970, Plymouth handed its performance division nine outrageous paint colors, a hood scoop that visibly shook with the engine, and a name borrowed from a shark’s cousin, then reserved the whole package for a car built in numbers so small that most muscle car fans will go a lifetime without seeing one in person. Here’s what actually separated the real thing from every Barracuda that merely looked the part, and why the answer comes down to a handful of very specific factory decisions.

An All-New Car, Not Just an Option Package

Before 1970, Barracuda was essentially a trim level bolted onto Plymouth’s economical Valiant. That changed completely with the E-body platform, a structure engineered specifically to accept Chrysler’s biggest engines rather than adapted after the fact. Plymouth widened and shortened the existing B-body architecture to create the E-body, then enlarged the engine bay specifically to swallow the 440 and 426 Hemi. Both engines shared the same reinforced suspension package built to handle the torque and horsepower those big-blocks produced, a structural commitment that made the 1970 ‘Cuda a genuinely different animal from anything wearing the Barracuda name before it.

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Numbers That Explain the Rarity

Every ‘Cuda built with the 426 Street Hemi came out of Chrysler’s Hamtramck plant in Detroit, and the total for 1970 was just 652 cars, including 14 convertibles. Of those, 368 came with the TorqueFlite 727 three-speed automatic, 264 got the close-ratio four-speed manual, and the remaining handful used the base three-speed manual. Each car carried a fender tag under the hood on the driver’s side, decoded bottom to top and left to right, with a letter code confirming Hamtramck assembly. Restorers and appraisers cross-reference that tag against broadcast sheets and engine block stampings whenever possible, since the combination of a low production number and a famous engine has attracted more than a few convincing fakes over the years.

Sizing Up the E-Body

The 1970 Barracuda measured 186.7 inches overall on a 108.0-inch wheelbase, with a curb weight around 3,395 pounds — compact by muscle car standards, which is exactly what made the Hemi option so intimidating. Stuffing a 426-cubic-inch, 7.0-liter engine into a chassis that size demanded the structural reinforcement Plymouth built into the E-body from the start. The result was a power-to-weight ratio that put the Hemi ‘Cuda in a class shared by only a handful of other cars from any manufacturer, regardless of how loyal a given enthusiast was to Ford, Chevy, or Mopar products.

The Hemi vs. the 440 Six Pack

Buyers cross-shopping the 426 Hemi against Plymouth’s own 440 Six Pack faced a real tradeoff. The Six Pack’s three two-barrel carburetors made nearly as much real-world power for a fraction of the Hemi’s price and complexity, which is exactly why so few buyers actually paid the Hemi premium back in 1970 — and exactly why Hemi cars carry such an outsized collector premium today relative to their original sales numbers. The 440 was the practical choice for most shoppers; the Hemi was the statement choice, and statement cars almost always end up being the rarest ones decades later.

Paying for One From the Factory

A base 1970 ‘Cuda carried an MSRP around $3,164, a genuinely attainable price for a performance car at the time. Checking the box for the 426 street Hemi added $871.45 on top of that, and buyers still had to choose a transmission: the standard three-speed came included, the four-speed manual added $194.85, and the TorqueFlite automatic ran roughly the same premium. Even the sound system carried real cost — an AM radio with a built-in eight-track deck added $196.25, and a rear speaker for genuine stereo sound tacked on another $14.05, numbers that look almost quaint against what a complete original system commands from collectors now.

Color, Scoops, and the Shaker Hood

Plymouth didn’t undersell the ‘Cuda’s presence. Nine deliberately unconventional colors joined an extensive decal package on the order sheet, and the shaker hood — a scoop bolted directly to the engine and visibly vibrating with it at idle — became one of the most recognizable options in the entire muscle car era. Buyers who wanted maximum attention could pair a shaker hood with one of the loudest available colors and walk away with a car that looked as aggressive parked as it sounded at wide-open throttle. Every visual cue on the car reinforced the same message the Hemi badge already sent: this was not a car built to blend into a parking lot.

Decoding a Fender Tag the Hard Way

Verifying a genuine Hemi ‘Cuda today means learning to read that original fender tag, and it is not intuitive. Every option installed at the factory shows up on the tag in a coded sequence that requires real study to interpret correctly, and the position of a single character can be the difference between a documented numbers-matching car and a well-built tribute. Given how few genuine street Hemi ‘Cudas exist — 652 total, spread across three transmission choices and two body styles — that verification step carries enormous weight in what a given car is actually worth.

Why It Still Anchors Muscle Car Conversations

More than fifty years later, the 1970 Hemi ‘Cuda remains a reference point for what Detroit’s factories were capable of when performance, rather than caution, drove engineering decisions. It combined a purpose-built chassis, the most powerful engine Chrysler offered, and styling that never pretended to be subtle, all wrapped around production numbers low enough to guarantee lasting scarcity. Whether the appeal is the numbers, the noise, or the sheer audacity of building a shark-nosed color palette around a drag-strip engine, the ‘Cuda earned its reputation the hard way — by being genuinely rare and genuinely quick at the same time.

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