What is the horsepower rating on a 1990 Chevrolet 350 engine?

The horsepower rating of a 1990 Chevrolet 350 engine varied depending on the specific application and the vehicle it was installed in. There wasn't a single horsepower figure. It ranged from approximately 170 hp to 230 hp. To know the exact horsepower for a particular engine, you would need to find its specific engine code (often found on a casting number on the engine block itself) and then consult a resource like a Chevrolet parts catalog or an automotive repair manual from that year.