The engine code for a 1965 Corvette with a big block engine is "Z". This code can be found on the engine block, near the front of the engine on the driver's side.
Engine Size
The big block engine in a 1965 Corvette is a 427 cubic inch engine. This engine is larger than the small block engine, which is a 327 cubic inch engine.
Body Style
The big block engine was only available in the coupe and convertible body styles of the 1965 Corvette. The hardtop body style was not available with a big block engine.
Performance
The big block engine in the 1965 Corvette produced 425 horsepower at 5,600 RPM and 460 pound-feet of torque at 4,000 RPM. The small block engine in the 1965 Corvette produced 300 horsepower at 4,800 RPM and 360 pound-feet of torque at 3,200 RPM.
