Dodge Coronet 1966 – 426 Hemi

A 1966 Dodge Coronet 440 hiding one of Mopar’s rarest factory combinations, the 426 Street Hemi paired with the A833 four-speed. Chrysler built only a few hundred like it, and most buyers couldn’t stomach the $907 price tag or the engine’s total disregard for comfort. Here’s what made this option so scarce, and why it still commands respect at every Mopar show it rolls into.

1966 Dodge Coronet 440 that features a Hemi / 4-speed punch, and is still in its original condition.

Most guys chasing a numbers-matching Hemi car end up settling for a tribute build wearing a crate motor and a good story. This 1966 Dodge Coronet 440 didn’t need either. Under that unassuming steel sheet metal sits one of the rarest factory combinations Chrysler ever bolted together in the mid-’60s, scarce enough that plenty of lifelong Mopar guys have never seen one in person, let alone owned one. What makes this particular car worth a second look isn’t just the engine code stamped on the block, it’s what that engine actually cost the original buyer, and how few people were willing to pay it.

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The $907 Question

Ordering the 426 Street Hemi on a 1966 Coronet 500 meant writing a check for $907.60, real money in 1966, and enough that Chrysler didn’t even bother engineering an air conditioning option around it, because nobody buying this engine was worried about staying cool in traffic. The Street Hemi backed off the race version’s brutal 12.0:1 compression to a still-serious 10.25:1 and swapped in hydraulic lifters instead of solid ones, but it kept the forged steel crank and rods straight out of the race engine, and it carried a factory rating of 425 horsepower and 490 lb-ft of torque, numbers that made it, on paper, the most powerful production engine America had built up to that point.

How Rare Is Rare

Chrysler built roughly 732 Hemi Coronets across the entire 1966 lineup, and the breakdown gets thinner the deeper you dig: around 34 went into base two-door sedans, 49 into Deluxe two-doors, 288 into 440 two-door hardtops, and 340 into Coronet 500 hardtops. Stack a four-speed on top of that and the math gets even tighter, of the 340 Coronet 500 hardtops built with the Hemi, only 204 left the factory backed by the A833 four-speed and its beefy 11-inch clutch. A car still wearing that original combination is sitting in territory most restorers only ever read about.

Why It Still Matters

Original, numbers-matching Hemi cars like this one are the reason Mopar auctions turn into blood sport. The 426 wasn’t just powerful, it was mechanically a different animal from anything else Detroit was building in the mid-’60s, right down to the forged internals the street version inherited straight from the race motor. A Coronet that’s held onto its factory drivetrain instead of getting swapped, tubbed, or quietly improved over sixty years is doing something a lot of so-called survivors can’t, telling the truth about what actually rolled off the assembly line, extra-large clutch and all.

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