What is proper idle speed for a 350 C10?

The proper idle speed for a 350 C10, typically found in Chevrolet trucks from the 1970s to early 1990s, is usually set between 600 to 800 RPM when in park or neutral. It's essential to adjust the idle speed according to the specific engine setup and any modifications made. Always refer to the vehicle's service manual for the recommended specifications based on your engine's configuration and conditions.