* 1957-1959: 185-290 horsepower
* 1960-1961: 230-290 horsepower
* 1962-1963: 250-300 horsepower
* 1964-1965: 220-300 horsepower
* 1966-1967: 195-275 horsepower
These horsepower ratings are approximate and may vary based on specific engine configurations and options.