Plymouth Road Runner 1970 Superbird 426

Plymouth built the 1970 Superbird specifically to win Richard Petty back from Ford, and only 135 of the 1,920 cars built that year got the 426 Hemi under that towering nosecone. This particular car belongs to Mike Fitzgerald, who bought it in 1972 and still gets emotional describing its restoration. Read on to find out what it took to bring one of the rarest aero cars back to factory-original condition.

Richard Petty had left Plymouth for Ford, and getting him back cost the company more than money. Plymouth built an entire street car around the goal of winning him over, a homologation special so extreme that NASCAR would only allow it on the track if Plymouth built enough copies for the public to buy. That number came out to 1,920 cars for the 1970 model year, and only 135 of those left the factory with the top-tier 426 Hemi under that towering nosecone. This particular Superbird belongs to Mike Fitzgerald, who bought it back in 1972 and still gets emotional describing the moment he saw it returned to its original glory after restoration. What does it actually take to bring a car like that back to exactly the way it left the factory?

Built to Win Back Richard Petty

The Superbird was Plymouth’s answer to the Dodge Charger Daytona, built to dominate NASCAR’s high-speed superspeedways and, more specifically, to lure Richard Petty back from Ford after he had left Plymouth over a factory dispute. NASCAR’s homologation rules required Plymouth to build enough street versions for public sale before the car could compete, which forced production to 1,920 units, all built during 1970. The strategy worked well enough on track, but rising insurance costs, tightening emissions rules, and NASCAR’s own rule changes against the aero cars meant 1970 would be the Superbird’s only model year before the whole aero-car era came to an abrupt end.

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The Hemi Under the Nosecone

Only 135 of those 1,920 cars were fitted with the 426 Hemi, backed by twin four-barrel Carter carburetors and conservatively rated at 425 horsepower at 5,000 rpm and 490 lb-ft at 4,000 rpm, though that figure was always an insurance-friendly fiction and real output was widely reckoned to be north of 500. Either way it was good for a 0-60 run of about 5.5 seconds in a car wearing an 18-inch nosecone and a wing tall enough to clear the trunk lid, hardly the aerodynamic profile most buyers expected out of a factory street car in 1970. That combination of raw output and aerodynamic bodywork made the Hemi Superbird one of the quickest and most distinctive cars sold to the public in 1970, Mopar or otherwise.

An Aero War Fought With a Rulebook

NASCAR’s superspeedway rules during this era essentially forced manufacturers into an arms race over aerodynamics, and Plymouth’s engineers responded by stretching the Road Runner’s nose and adding that towering rear wing specifically to keep the car planted at the speeds Petty and his rivals were reaching on tracks like Daytona and Talladega. The wing height wasn’t arbitrary either — it needed to clear the trunk lid so owners could still use the car as, technically, a functioning street vehicle.

One of 135, and He Has Owned It Since 1972

Mike Fitzgerald’s car, purchased in 1972, is one of that rare 135-car Hemi group, which helps explain why seeing it returned to factory-original condition hit him as hard as it did. Buying a Superbird just two years after the model went out of production put him ahead of the collector curve that would eventually send Hemi Superbird values into six and seven figures decades later, back when these cars were simply used performance machines rather than blue-chip collectibles.

Why the Superbird Lasted Only One Year

The same aerodynamic extremes that made the Superbird so effective on track also made it a target once NASCAR decided the aero-car era had gone too far. Combined with skyrocketing insurance premiums on anything wearing a Hemi badge and the first wave of emissions regulations starting to squeeze high-compression engines, Plymouth’s own management had little incentive to continue a program built almost entirely around one very specific racing strategy that regulators were actively working to shut down.

Restoring a Car This Rare

Bringing a 135-car-production Hemi Superbird back to factory-original condition is not a project most restoration shops take on lightly. Every panel, from that stretched nosecone to the trunk-clearing wing, has to match factory geometry precisely, and sourcing correct Hemi-specific components for a car this rare means working from documentation rather than guesswork. Getting it right is exactly the kind of project that produces the emotional reaction Fitzgerald described seeing his car in for the first time.

The Homologation Rule That Made It All Possible

None of this would exist without NASCAR’s homologation requirement forcing Plymouth to sell real street versions of its race car to ordinary customers. That single rule is why a genuine race-bred aero car with a 426 Hemi option ever became available to the public in the first place, rather than staying locked inside a factory race shop the way similar engineering exercises might today.

A Nosecone That Still Turns Heads

Decades after the aero wars ended, the Superbird’s exaggerated proportions — that towering wing, the stretched nose, the fastback rear glass — still draw a crowd at car shows in a way few other muscle cars manage. It doesn’t look like anything else Detroit built in this era, and that visual shock value has only helped drive collector interest as more people learn the actual story behind why it looks the way it does.

One of the Genuine Rarities of the Muscle Car Era

A 1,920-car production run sounds substantial until it’s narrowed down to 135 Hemi cars, and narrowed further still to the handful with a single-owner history stretching back to 1972. Fitzgerald’s Superbird sits at the intersection of all three of those rarity filters at once.

Why Hemi Superbirds Command the Top of the Market

Among Mopar collectors, a documented 426 Hemi Superbird sits near the very top of the market, ahead of even the more common 440-powered examples, precisely because so few were built and because the combination of homologation history, aerodynamic extremes, and Chrysler’s most legendary engine rarely comes together in one car. Fitzgerald’s ownership history since 1972 only adds to that documentation, giving the car a provenance trail that matters enormously to serious collectors evaluating authenticity. Share your thoughts in the comments below.

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