* Year of the engine: Torque specs changed slightly over the years of the 350's production.
* Specific crankshaft: Different crankshafts may have slightly different specifications.
* Bearing material: The type of bearing (e.g., standard, performance) affects the torque.
* Whether you're using new or used bearings: Reused bearings may require a different approach.
You absolutely must consult a service manual specific to the year and model of your Chevy 350 engine. This manual will provide the correct torque specifications and the proper procedure for installing the main bearings. Using the wrong torque can lead to engine damage, including crankshaft damage and bearing failure.
Trying to find the spec online without knowing the exact engine details is dangerous and unreliable. The cost of a service manual is far less than the cost of engine repair or replacement.
