What is the horsepower rating for a 1970 Buick 455?
The horsepower rating for a 1970 Buick 455 varied depending on the model and specific carburetor and other options. There wasn't one single rating. You'll find ratings ranging from approximately 360 hp to over 370 hp depending on the application. To know the exact horsepower for a particular 1970 Buick with a 455, you'd need to consult the car's original documentation (owner's manual, build sheet, etc.).