The five original Chevy Corvette Grand Sports are undoubtedly some of the most famous Vettes ever built. Developed by Zora Arkus-Duntov as race-spec, lightweight C2 models aimed at besting the Shelby Cobra on the track, the Corvette GS is the dream of innumerable enthusiasts. Now, we’re checking out this hot-to-trot replica from Superformance, which comes equipped with 750 naturally aspirated horsepower under the hood.
Outside, we see this Corvette GS replica rocking an Admiral Blue paint finish that’s offset with a white stripe running down the spine. The corners house a set of 18-inch wheels in the rear and 17-inch wheels in front wheels, with a polished lip and gray center, although Superformance also offers a period-correct 15-inch wheel if desired. There’s also a set of custom hood vents to give us a peek at what’s lurking underneath.
The original Corvette GS had a 327 V8 that was bored and stroked out to 377 cubic inches, producing upwards of 485 horsepower. This replica, however, is now equipped with an atmospheric 427 V8 Mercury SB4. This quad-cam beast is essentially a boat motor that was converted to street use, and can spin up to 8,000 rpm. Connected to a set of polished side pipes, it also sounds the business.
The 7.0L V8 connects to a Tremec T56 Magnum six-speed manual transmission, which feeds a C2 / C3 locker diff with an external cooler mounted on the roof.
Inside, we find Superformance’s Touring interior, which features black leather and carpet, a tilt steering wheel, power windows, power locks, and air conditioning. There’s also a set of Autometer gauges to keep tabs in vitals, plus a trunk to make this Corvette GS a very usable street machine.
Under the skin, Superformance used its complete factory-assembled rolling chassis, built under license from General Motors using the original tooling. A composite rear leaf spring is in the rear, while modified front steering geometry enables a tighter turning radius. Hauling it down is a set of disc brakes from Wilwood, with power-assist and drilled and slotted rotors. The whole shebang weighs less than 3,000 pounds.
For those fans that lust after the Corvette GS, this thing hits all the high notes. Hit play to hear it for yourself.