![[VIDEO] Superformance '63 Grand Sport is Rocking a 750-hp Mercury SB4 427 Boat Motor](https://www.corvetteblogger.com/images/content/2021-2/112421_2b.jpg)
The original 1963 Corvette Grand Sports need no introduction to enthusiasts.
But while those five special racing Corvettes dreamed up so long ago by Zora Arkus-Duntov were great cars, the truth is a lot of advancements have been made over the past 58 years.
![[VIDEO] Superformance '63 Grand Sport is Rocking a 750-hp Mercury SB4 427 Boat Motor](https://www.corvetteblogger.com/images/content/2021-2/112421_3b.jpg)
So what if a ’63 Grand Sport could be brought into the 21st century to take advantage of all that progress?
Well, it has been by a 25-year-old company named Superformance, which is licensed by GM to build replica Grand Sports built off the original GM tooling but with all the modern conveniences.
![[VIDEO] Superformance '63 Grand Sport is Rocking a 750-hp Mercury SB4 427 Boat Motor](https://www.corvetteblogger.com/images/content/2021-2/112421_4b.jpg)
YouTube’s “AutotopiaLA” recently spotlighted one of their latest creations, and the video offers some insight into just how special these cars are.
This particular one boasts of a Mercury Racing SB4 engine that despite being naturally aspirated manages to crank out a whopping 750 horsepower and revs up to 8,000 RPM. It’s hooked to a Tremec T56 six-speed transmission.
![[VIDEO] Superformance '63 Grand Sport is Rocking a 750-hp Mercury SB4 427 Boat Motor](https://www.corvetteblogger.com/images/content/2021-2/112421_5b.jpg)
But that’s just the beginning of the story about this car.
Let’s move to the interior, where it’s graced by leather upholstery, carpet, Vintage Air conditioning, a tilt steering wheel, power windows, AutoMeter gauges, and other civilized amenities not present in those original Grand Sports that makes it into a very livable air.
![[VIDEO] Superformance '63 Grand Sport is Rocking a 750-hp Mercury SB4 427 Boat Motor](https://www.corvetteblogger.com/images/content/2021-2/112421_6b.jpg)
The replicas even have a trunk where the race car had an access panel to the rear suspension and differential to service those parts during a race.
All in all, we feel sure Zora would be pleased with these upgrades to his Grand Sports, which were nixed by GM before the planned 125 could be built. Fortunately, he was able to save all five actually built from the crusher and now they are some of the most prized Corvettes in existence.
Source:
AutotopiaLA via autoevolution.com
Related:
[VIDEO] Superformance Corvette Grand Sports Visit Jay Leno’s Garage
[VIDEO] The Superformance 1963 Corvette Grand Sport Named ‘El Niño’
[VIDEO] Superformance Remakes the Legendary Corvette Grand Sport
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OUTRAGEOUS / OUTSTANDING / OUT OF THE WAY PEOPLE, CORVETTE COMING THRU.
The Grand Sport replica from Superformance is just the best way to fly, but the engine should be a Chevrolet 427 cubic inch aluminum block, with the highest compression heads, a 6-pack velocity stack fuel injection system, huge 3″ headers/side pipes, the 6-speed Tremec and a quick change electronic locking differential. Then tub the rear wheel wells for at least the 345/25ZR21 Michelin Pilot Sport Cup 2 R ZP tires on carbon fiber wheels, with Wildwood Ceramic Carbon brakes and then try to find a 360 degree radar detector system and an in-ground premium VP racing fuel tank at your house to supply the high octane gas that is necessary.
Then Mr. Zora would be very proud that his creation is still the best Hot Rod to drive, fast – very fast but in control at all times. What a beautiful version of the Grand Sport that Hillbank has engineered, congratulations for a real Grand Sport Corvette.
Bad Ass !
That’s mean! I’ve seen a Superformance 63 Grand Sport in this same color scheme at a Corvette show and it was awesome. I
BEAT VETTE EVER, skip the stupid boat motor tho….
The engine is based on an LS7 block, so it’s not a stupid boat motor. It is equipped with GM/Chev C4 ZR1 based, Mercury Marine developed Dual Over Head Cams.
Mercury Marine introduced the SB4 in 2016, has been selling the SB4 for the automotive market for years as a crate ready-to-go, and most recently partnered with Roadster Shop for better retail distribution.
This is an awesome application for this engine.
https://www.mercuryracing.com/blog/mercury-racing-reveals-sb4-7-0-automotive-crate-engine.html
https://roadstershop.com/engines/mercury-racing-sb4-dohc/
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