How many horsepower is a 4.3 chev engine?

The horsepower of a 4.3L Chevy engine varies significantly depending on the year of manufacture, the specific model (e.g., Vortec, etc.), and its modifications. There's no single answer. You'll find horsepower ranging from roughly 160 hp to well over 200 hp in different applications. To find the exact horsepower for a specific engine, you need to know the year and model of the vehicle it's in or find the engine's specific specifications (often found on a sticker on the engine itself).