A highly rare 1966 Chevrolet Corvette equipped with the coveted N03 “Big Tank” option is set to cross the auction block, drawing attention for both its performance heritage and unique history in Canada. The model stands out as one of only two examples of its kind originally exported to the Canadian market, adding a distinctive layer of exclusivity to an already scarce configuration.
The N03 option, often referred to as the Big Tank, featured a significantly enlarged 36.5-gallon fuel tank. It replaced the standard 20-gallon unit and was developed to extend range during endurance racing events such as Sebring and Daytona. The option first appeared in 1963 as part of the Z06 performance package, a program spearheaded by engineer Zora Arkus-Duntov. At the time, General Motors supported a ban on factory-backed racing, prompting the creation of the Z06 for private customers seeking competitive performance.
By 1964, the Big Tank became available as a standalone option, continuing through 1967. Despite its availability, it remained exceptionally rare. Chevrolet produced only 210 Corvettes equipped with the N03 option between 1963 and 1967. Of those, just 66 were built in 1966, making this particular model part of the largest single-year production yet still highly limited overall.
What distinguishes this Corvette further is its documented delivery to a dealership in Rouyn-Noranda, Quebec. Combined with its Canadian export status, the vehicle holds a one-of-two designation supported by original paperwork. The car has also earned numerous accolades following restoration, including Bloomington Gold and Triple Diamond certifications, as well as multiple NCRS Top Flight awards and a Concours Gold recognition at the Muscle Car and Corvette Nationals.
In addition to its rarity, the Corvette is notable for its extensive list of factory options. Equipped with 18 features, it includes performance and comfort enhancements such as a Posi 4.11 rear axle, power steering, leather interior, teakwood steering wheel, and tinted glass.
Under the hood, the car retains its original 327-cubic-inch V8 engine producing 350 horsepower, paired with a four-speed manual transmission. This powertrain was a popular choice among buyers in 1966, further enhancing the car’s appeal.
The Corvette is scheduled to be auctioned at an upcoming event in Indianapolis, where it is expected to command significant interest from collectors seeking a rare and historically significant example of American performance engineering.
Via Mecum
