How do you set a distributor on a 1990 Chevy Camaro rs 3.1?

To set the distributor on a 1990 Chevy Camaro RS 3.1, start by aligning the engine to TDC (top dead center) on the compression stroke for cylinder number one. Remove the distributor cap and ensure the rotor is pointing towards the number one spark plug terminal. Adjust the distributor as necessary to ensure proper timing, typically around 10-12 degrees before TDC. Finally, reassemble the cap, start the engine, and check the timing with a timing light, making further adjustments if needed.