On a 1991 Camaro RS with a 5-speed manual transmission, there isn't a neutral safety switch in the same way an automatic transmission would have one. The starter interlock system for a manual transmission is usually integrated into the clutch safety switch. This switch prevents the car from starting unless the clutch pedal is fully depressed.
Therefore, you won't find a separate "neutral safety switch." If you're having starting problems, the clutch safety switch is the likely suspect. It's usually located on the clutch pedal assembly itself or very near it.
