Plymouth RoadRunner 1970 – “440 Six Pack” Cruisin’ The Coast 2015

Plymouth built fewer than 1,500 Road Runners with the 440 Six Barrel option for 1970, pairing three carburetors and a 390 horsepower V8 with a deliberately stripped-down look. No chrome, no hubcaps, just a fiberglass hood and a Dana 60 rear end built to survive whatever the driver asked of it.

That is a pretty cool survivor!!

Plymouth built the Road Runner to be the muscle car people could actually afford, which makes the 440 Six Pack version something of a contradiction on wheels. Buyers who checked that option box got a black fiberglass hood held down by four visible pins, a functional scoop stamped with warning-label-style decals, and steel wheels with no hubcaps at all, as if Plymouth wanted the car to look stripped down even while hiding one of the most serious engines it ever offered. Under that scoop sat three two-barrel carburetors working together instead of one, an unusual induction setup for a company that built its reputation on simple, brutal V8s. Fewer than 1,500 cars ever left the factory with this exact combination. What made Plymouth build something this deliberately raw?

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Three Carburetors, One Purpose

The A12 option package centered on a 440 cubic inch V8 fed by three Holley two-barrel carburetors working in sequence, officially rated at 390 horsepower at 4,700 rpm and 490 lb-ft of torque at 3,200 rpm, backed by a Dana 60 rear axle with a 4.10 gear ratio built to handle the torque without complaint. Plymouth built roughly 1,432 examples of the 440 Six Barrel A12 Road Runner for 1970, a production run small enough that survivors from a single cruise-in event carry genuine documentation value among collectors.

Deliberately Stripped, Deliberately Loud

Unlike showier muscle cars of the era, the 440 Six Barrel skipped chrome trim, wheel covers, and hubcaps entirely, relying instead on 15×6 inch steel wheels and a functional lift-off hood to signal exactly what it was built to do. Some very early 1970 cars, built before January of that year, still carried over the aluminum Edelbrock intake manifold from the 1969 M-code option before Plymouth switched to a cast-iron piece, a small production detail that collectors now use to date the earliest examples of the run.

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