1. Loosen the distributor clamp bolt.
2. Turn the distributor counterclockwise to advance the timing and clockwise to retard the timing.
3. Start the engine and check the timing with a timing light.
4. Adjust the timing as necessary to achieve the desired performance.
To idle down a Chevy 350, you will need:
1. Locate the idle speed adjustment screw on the throttle body.
2. Turn the screw clockwise to increase the idle speed and counterclockwise to decrease the idle speed.
3. Adjust the idle speed to the desired level.
