Horsepower rating of 1973 351 Cleveland?

The horsepower rating of a 1973 Ford 351 Cleveland varied depending on the application and the specific options. There wasn't a single horsepower figure. You'll need to know more specifics about the engine to determine its horsepower. Factors affecting the horsepower include:

* Vehicle it was in: Was it a Mustang, Torino, Cougar, etc.? Different models often had different engine calibrations.

* Carburetion: The type of carburetor (2-barrel, 4-barrel, etc.) significantly impacted power output.

* Exhaust System: The type of exhaust manifolds and mufflers influenced the engine's breathing.

Without this information, it's impossible to give a precise horsepower rating. However, you can expect the horsepower to be in the range of 245-300 hp, depending on the factors listed above. The lower end would represent a less powerful version (perhaps with a 2-barrel carburetor and restrictive exhaust), while the higher end would be for a more performance-oriented setup.