What is the rated horsepower of a 1973 Chevy Cheyenne super 454?

The 1973 Chevrolet Cheyenne Super with the 454ci big-block engine came in several variations, and the horsepower rating varied slightly depending on the specific carburetion and other factors. However, the most common horsepower rating for the 454 in a 1973 Cheyenne Super was 270 hp. There might have been some higher-output versions available depending on options, but 270 hp is the generally accepted figure.