This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease - story fullscreen Fullscreen

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease

Watch a Twin-Turbo LS 66 Chevelle burn rubber at the LS Fest West

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If you went to your regional weekend car show, what would be the most popular mid-size muscle car you’d see there? You might probably answer, Chevelle, and there’s a reason for it. The Chevelle was one of Chevrolet’s most popular vehicles, and it was one of the best-selling cars of all time. To this day, it is still a model sought after by collectors & hot rodders.

Brief History of the 66 Chevelle

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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In 1966, Chevrolet relaunched its Super Sport Chevelle as the performance muscle car to have. The 66 model year saw various improvements to the Chevelle, the most notable of which was a complete restyle to take the form of the Coke-bottle body style that was popular at the time.

That year, the SS became its own model. The Z16 package, as well as the 283 and 327 in the SS trim levels, were omitted, however, the 396 persisted with a power output ranging between 325 to 375 horses.

From Father to Son

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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With all the mods, this 4000 lbs 66 twin-turbo SS demolishes the quarter mile in 8.46 seconds at 171 mph

Today, we’re taking a look at Griffin Steinfeld’s 1966 Chevelle SS.

This magnificent-looking machine has been in his family for the past 16 years, spanning two generations.

It was a Christmas gift from his Mom to his Dad. Griffin considers himself really fortunate to be able to share this car with his father.

How the LS Swap came about

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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The twin-turbo LS-powered V-8 that lies under the hood provides some ballistic fire spitting performance

The story of the LS swap on this particular car began a few months ago when Steinfeld dropped a valve on the old school small block and ended up destroying the engine.

He says that he had an LS engine lying around in his garage and he along with his pals managed to swap the old small block for the LS. They managed this feat in just five days which is outstanding for a homemade effort.

According to Griffin, the Chevelle retains its bone-stock chassis from 1966, which is kept in check by a Holley Dominator EFI system that also controls the 4L80-E automatic transmission. Can you believe that it is still rocking power windows and power steering?

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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Steinfeld dropped a valve on the old school small block and ended up destroying the motor

The structural rigidity is improved thanks to the addition of a roll cage. The Viking Performance double adjustable shocks at both ends with stock geometry and Currie rear axle significantly boost the straight-line grunt on the asphalt.

A Holley Lo-Ram EFI intake manifold along with a touchscreen display in the center of the MCD7 carbon fiber dash and two Evo 2 Sparco Racing seats finish off the cockpit. Griffin also admired the guys at Holley and how they’re always there to support should they have a problem with any of the parts.

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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The Chevelle’s cockpit is fitted out with Sparco racing seats and a carbon-fiber dash

This Chevelle is outfitted with Mickey Thompson drag radials on the rear with skinnier tires upfront. The twin-turbo LS-powered V-8 that lies under the hood provides some ballistic performance. It can spit flames through the exhaust in the hood.

The fastest quarter-mile run so far on this Chevelle according to Steinfeld was 8.46 seconds at blistering a 171 mph.

That is some pace for the old Chevy that weighs close to 4000 lbs with Griffin at the wheel.

To sum it up

This LS-Powered 1966 Chevy Chevelle Rips 8-Second Quarter-Miles With Ease
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With all the mods, this 4000 lbs 66 twin-turbo SS demolishes the quarter mile in 8.46 seconds at 171 mph

This one-of-a-kind Chevelle is insanely fun on the drag strip and we’re glad to see the excitement is shared between father and son. This exceptional and uncommon Chevelle has to be one of the quickest and most coveted Chevelle SS out there. The Chevelle still continues to be regarded as one of the forerunners today just as it had helped pave the path for future muscle cars over five decades ago.

Check out Griffin Steinfeld’s 66 Chevelle below.

Khris Bharath
Khris Bharath
Khris is a classic car aficionado and adores his Jags and Alfas, although he keeps tabs on everything from super exotics like an old EB 110 to the latest from Lucid. Formula One is very close to his heart, and he diligently makes time to tune in for the Grand Prix on Sundays. Khris also loves his road trips and he prefers stick shift over an Auto any day.  Read full bio
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