How do you set timing on Chevy 396 by ear?

To set the timing on a Chevy 396 by ear, first ensure the engine is warmed up and idling smoothly. Carefully advance the timing by turning the distributor slightly while listening for the best engine response—look for a smooth idle and increased throttle response. If the engine begins to ping or knock under load, back off the timing slightly. It's essential to find a balance where the engine runs optimally without detonation.