How much would you pay for this one?

The triple-carb 440 under this Cuda’s hood was not a casual option. Plymouth built barely 1,700-some of them in 1970, split between four-speed and automatic cars. Here is what made the 440 Six Pack such a rare and serious performance package, and why guessing its value takes more than eyeballing the sheet metal.

A classic red muscle car parked outdoors near a building.

Putting a price on a car like this one is harder than it looks, because the number people expect and the number these cars actually command at auction rarely line up. The 440-cubic-inch triple-carb engine under that long hood was not just an option box Plymouth casually checked; it was one of the rarest, most deliberately built performance packages the brand ever offered, and only a few thousand buyers ever ordered one. Between the six-barrel intake, the four-speed-versus-automatic split, and a production run smaller than most people assume, guessing a fair number for this Cuda means understanding exactly how uncommon the combination under its hood really was.

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A Six-Pack, Not a Single Four-Barrel

For 1970, Plymouth offered the Cuda with an optional 440-cubic-inch V8 wearing the Six Pack or 440+6 badge, referring to its three two-barrel Holley carburetors instead of a single four-barrel. The setup made 390 horsepower at 4,700 rpm and 490 lb-ft of torque at 3,200 rpm, numbers that put it right alongside the 426 Hemi as one of the most serious factory engines Chrysler built that year.

How Rare Is Rare

Plymouth built just 1,784 Cudas with the 440 Six Pack in 1970. Breaking that down further, roughly 1,755 of them were hardtops, with 902 leaving the factory with a four-speed manual and the remainder paired to a TorqueFlite automatic. That is a genuinely small slice of the total Cuda production run for the year, and it is the single biggest reason these cars command such strong money whenever a numbers-matching example changes hands today.

What Drives the Price

Auction results for 440 Six Pack Cudas swing enormously based on documentation, originality, and drivetrain matching. A numbers-matching four-speed car in solid original condition sits at the very top of the range, while a car with a replacement engine or a repainted body falls well below it. Add in the broader Mopar muscle car boom of recent years, and a genuinely correct 1970 Cuda 440+6 is one of the harder cars on this list to guess a fair number for without seeing the paperwork first.

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