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Engine Bay Photo-Chevrolet-Corvette

Engine Bay Photo Engine Bay Photo Engine Bay Photo Engine Bay Photo Engine Bay Photo Engine Bay Photo
1966 Chevrolet Corvette Grand Sport Replica

Offered Without Reserve
Scottsdale 2012
Consignment # 1375
VIN:   194676S114273

Run # F536

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Vehicle to be offered for Auction sale WITHOUT RESERVE and SOLD to the highest bidder, January 18th – 22nd, 2012 at Russo and Steele's 12th Annual Scottsdale Arizona Auction. Please contact us for more information.

In 1962 Corvette initiated a program to produce a lightweight version of the Corvette StingRay based on a prototype that mirrored the new 1963 Corvette. The Corvette Grand Sports were raced with several different engines, but the factory engine actually used was a 377ci all-aluminum, small block with four Weber side-draft carburetors, rated 550 hp. The body panels were made of thinner fiberglass to reduce weight and the frame was constructed of extremely light steel tubing. The Grand Sport project was known simply as “The Lightweight”, when it was set to go up against Ford’s Shelby Cobra GT.

The first Grand Sport coupe was finished in December of 1962, and at 1900 lbs weighed 37% lighter than stock. The initial tests at Sebring looked favorable, but too much information leaked and Duntov was under pressured by GM to stop development just one month later. None of the cars showed up at Sebring as planned, but thankfully none were scrapped either.

Duntov was reluctant to retire his project and instead sold two of the three working cars to private teams. Unfortunately, these two Grand Sports were limited to C-Modified class when they were really designed for the production Grand Touring class. Duntov wanted to maintain development and make the cars more competitive but the AMA ban meant that it was technically not allowed.

Not resting on his laurels, Duntov took the first Grand Sport and developed the suspension to support larger Goodyear 8.20x15 stock car tires. These nearly doubled the tire widths, increasing grip from 0.9g to 1.1g.¹ With huge flares, new scoops to clear the 58mm Weber carburetors and rear mounted differential coolers, three of these definitive coupes were prepared for the Nassau Speed Week. Despite front end lift problems, Dick Thompson won his class and Duntov finally got his revenge from Shelby.

This '66 Corvette Grand Sport roadster was built by Mid-America Industries, the pioneer in Corvette Grand Sport conversions since l983. Specifications: Wheel base 98"Curb weight 2480 pounds. Chassis 4" tube main rails and cross-members with laser cut bracketry'90 Corvette C-4 Aluminum suspension. Aldan American Eagle adjustable front coil over shocks Factory rear monoleaf spring with gas shocks Corvette power rack & pinion steering C-4 Corvette power booster and master cylinder with vacuum assist pump 22 gal stainless steel fuel tank5 x 8 front and 15 x 10 rear reproduction Grand Sport rims. Custom radiator with electric cooling fan Motor 383 Stroker upgraded by American Speed Enterprises. Dyno tested 468hp @5500rpm 514 ft-lb torque @4100rpm Edelbrock aluminum heads and water pump. Dana 44 rear end MSD ignition with Al box. Upgraded to T-56 6 speed transmission Custom headers with low restriction side exhaust ldidit steering column and intermediate shaft Custom aluminum instrument panel with Autometer gauges. It has a full carpet including trunk and painted and clear racing headlamp covers. It also has the Roger Penske decal set with Daytona hood and is finihsed in Dupont Sun Oil blue paint.

This car was constructed to replicate the Roger Penske version raced at Sebring in March of 1966 which was one of only two roadsters ever produced by GM.