The horsepower of a 1966 Chevy II Nova with a 327 engine varied significantly depending on the specific configuration. Chevrolet offered several different versions of the 327 in 1966, each with varying horsepower ratings. These ranged from approximately
210 hp to as high as 350 hp for the L79 high-performance version.
Therefore, there's no single answer. To know the exact horsepower of a particular 1966 Nova with a 327, you'd need to look at its original specifications (often found on a build sheet if one exists) or examine the engine itself for casting numbers and other identifying marks.
