A 600 cubic inch 1970s engineering marvel – one of the earliest tube frame IMSA cars is now up for grabs!
In 1976 IMSA decided that they’d allow full tube frame cars to compete in their premier North American Road Racing series – the result was complete madness! Manufacturers scrambled to construct big horsepower tubular monsters, and this Corvette was one of the very first. 
John Greenwood built the car with the help of chassis designer Bob Riley – together they crafted a pair of incredible Greenwood Corvettes. This particular car was the latter of the two.
Powered by a 600ci Donovan big block, the ’77 built Greenwood GT Supervette was constructed entirely from lightweight chromoly at great expense – making it’s 900 odd horsepower even more ferocious. 
It all added up to an outright victory in the Manufacturer Champion Camel GT Challenge All-American GT Division of 1978. The car has also raced at Road Atlanta, Laguna Seca, Hallett, Lime Rock, Brainerd, Daytona, Sears Point, Portaland, Sebring and Riverside – just to name a few. Canepa call it “one of the most successful and historically significant Corvettes in IMSA history”. 
Despite having spent such a considerable amount of time competing across a huge range of tracks during its era, the car presents itself immaculately in 2014. This is because it was completely restored a little over ten years ago, and has been used in just five vintage events since. 
No doubt it’s completely over the top, even within the context of 1970s racing cars. It’s a 900 horsepower, Jerico four-speed monster with some of the most unapologetic bodywork you’re likely to ever see. Personally, we’d love to own it! 
If you feel the same way, be sure to get in touch with Canepa to discuss further details. This car is described as being completely sorted and ready to race – we like the sound of that! 
Further information: Canepa Design
For sale: 1977 IMSA ‘Supervette’ is a post from Motorsport Retro, bringing you classic motorsport, cars, motorcycles and gear every day.