Holy-Grail 1970 Chevrolet Chevelle LS6 Spent 50 Years in Hiding

The year was 1970 when Chevrolet introduced the iconic Chevelle LS6, a car that would become the holy grail of the Chevelle lineup. With its powerful engine and aggressive design, the LS6 quickly gained recognition as one of the most potent factory muscle cars of its time. Today, we uncover the story behind a remarkable find—a 1970 Chevrolet Chevelle LS6 that had spent the past 50 years in hiding.

In response to the growing demand for midsize cars, General Motors developed the A-body platform in 1963. This platform found its way into various vehicles, including the Pontiac GTO, Oldsmobile 442, and the Buick Skylark. Chevrolet seized the opportunity and introduced the Chevelle as its contender against the Ford Fairlane. Initially designed as a volume-seller for the low-priced midsize market, the Chevelle quickly evolved into a formidable muscle car with the introduction of the SS model in 1964.

Chevrolet pushed the boundaries of performance further in mid-1965 with the release of the Z-16 package. This upgrade featured a 396-cubic-inch (6.5-liter) big-block V8 engine, generating an impressive 375 horsepower. However, Chevrolet didn’t stop there. As the 1960s came to a close, the company responded to the growing demand for more power and aggression in muscle cars. In the late 1960s, Chevrolet introduced the LS5 and LS6 engines for the Chevelle, with the latter becoming the most potent factory muscle car of its era.

The LS6 engine, initially offered in the Corvette, packed a punch with its four-barrel Holley carburetor. Officially rated at 450 horsepower, it is widely believed that the LS6 actually delivered over 500 horsepower in factory form. With 500 pound-feet (678 Nm) of torque, the LS6 surpassed even the legendary 426 HEMI V8. This incredible power made the Chevelle SS 454 LS6 an instant sensation among muscle car enthusiasts.

While Chevrolet intended to continue production of the LS6 engine into 1971, it turned out to be a one-year wonder. Only 4,475 vehicles were equipped with this mighty engine, including Chevelle hardtops, convertibles, and even the El Camino pickup truck. Despite its relatively low production numbers, the LS6 became highly sought-after and remains a prized possession among collectors to this day.

After decades of obscurity, the 1970 Chevrolet Chevelle LS6 we present here emerges as a remarkable discovery. While it did not spend a full 50 years in hiding, its historical significance and unique features make it an important find for Chevelle enthusiasts. Recently contacted by the third owner for inspection and endorsement, renowned Chevelle expert Patrick Glenn Nichols sheds light on the car’s intriguing story.

Detailed examination of the vehicle’s existing cowl tag and partial build sheet confirmed that this is indeed an authentic SS 454 LS6 model. Its stunning appearance in Fathom Blue paint with white stripes, a white vinyl top, and white bucket seats make it an exceptional specimen. Furthermore, this particular Chevelle was built in Kansas City and features rare SS door panels, adding to its exclusivity.

Although the car has undergone some changes over the years, including repainting and component replacements, the owner has ambitious plans to restore it to its former glory. Undoubtedly, finding a date-correct LS6 engine and M22 gearbox will pose a challenge, but not an insurmountable one.

Once completed, this gorgeous Chevelle will be worth north of $100,000 despite not having a numbers-matching drivetrain. Until that happens, watch it sitting in a garage in the video below. 

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