* Engine Variations: Even within the "350" designation (referring to cubic inches), Chevrolet used various engine configurations in 1990. The horsepower output varied significantly depending on factors like:
* Carburetion: Was it a carburetor or fuel injected engine?
* Cam Profile: Different camshafts produce different power bands.
* Compression Ratio: Higher compression generally means more power.
* Exhaust System: Modifications to the exhaust can affect horsepower.
* Trim Levels: While the "Sport" package might imply a more powerful engine, it's not a guarantee. The specific trim level could have had variations in engine options.
To find the exact horsepower:
1. Locate the Engine Code: Look for a VIN (Vehicle Identification Number) tag on the driver's side door jamb or engine block. The engine code is usually a series of letters and numbers.
2. Use an Online Database: Websites like AutoZone or CarPart.com offer VIN decoders. Enter your VIN, and they can often tell you the specific engine and its horsepower rating.
3. Consult the Owner's Manual: The original owner's manual might have details about the engine and horsepower for your specific model year and trim level.
Remember, horsepower can also be affected by engine modifications. If the engine has been altered since its manufacture, the original horsepower rating may no longer be accurate.
