The horsepower of a 1990 Chevrolet pickup truck with a 350 engine varied depending on the specific trim level and options. There wasn't just one single horsepower rating. However, a common range for a naturally aspirated (non-turbocharged) 350 cubic inch (5.7L) small-block V8 in a 1990 Chevy truck would be between
170 and 230 horsepower.
To know the exact horsepower for a particular truck, you'd need to check the original owner's manual or the vehicle's specifications sticker (often found in the glove compartment or on the driver's side doorjamb).
