* Engine variations: The 350 cubic inch (5.7L) small-block Chevy engine came in many variations in 1990, each with different internal components (camshaft, intake manifold, carburetor/fuel injection system) resulting in differing torque curves. Some were designed for higher horsepower, others for more low-end torque.
* Modifications: Any modifications made to the engine (e.g., aftermarket camshaft, headers, intake) would significantly alter the torque output.
To find the torque for *your* specific 1990 Chevy 350 truck, you need to:
1. Identify the exact engine code: This code (often a letter or number combination) is usually found on a casting on the engine block itself, and will help determine the specific engine configuration.
2. Consult a factory service manual or an automotive repair resource: Once you know the engine code, you can find the factory torque specifications in a service manual for your truck's year and model. Sites like Haynes or Chilton offer manuals that often provide this information.
3. Look for a factory horsepower/torque sticker (if present): Some trucks may have had a sticker under the hood indicating the factory horsepower and torque ratings.
Without knowing the specific engine code and any modifications, it's impossible to give you a precise torque figure. However, a *rough estimate* for a stock 1990 350 Chevy truck engine might be in the range of 280-330 lb-ft of torque, but this is just a very general range, and the actual value could be considerably higher or lower.
