For the 1966 Corvette, the big-block V-8 came in two forms: 390 hp (290 kW) (Early versions were rated at 400 hp but changed to 390 hp) on 10.25:1 compression, and 425 bhp via 11:1 compression, larger intake valves, a bigger Holley four-barrel carburetor on an aluminum manifold, mechanical lifters, and four- instead of two-hole main bearing caps.
The 1966 model’s frontal appearance was mildly altered with an eggcrate grille insert to replace the previous horizontal bars, and the coupe lost its roof-mounted extractor vents, which had proven inefficient. Corvettes also received an emblem in the corner of the hood for 1966. Head rests were a new option, one of the rarest options was the Red/Red Automatic option with power windows and air conditioning from factory which records show production numbered only 7 convertibles and 33
coupes.
Triple Black: Tuxedo Black with Black Top and Black Interior
