For 1966, the 396 engine used in the 1965 Corvette was enlarged to 427 cubic inches. This increase in displacement provided for 10 extra horsepower and 45 lb-ft more torque.
Chevrolet Corvette 1966 specifications:
Configuration:Front Engine/RWD
Engine:V8Displacement:6997 cc
Horsepower:425 bhp @ 5600 rpm
Torque:460 lb-ft @ 4000 rpm
Transmission:4-Speed Manual