Can you tell me the location of the nutral clutch safety switch?

Yes but you have to find it. Check on the clutch pedal I think in that time was the usual spot. If you wanted u can even bypass the switch. Should be a normal open or closed switch, if so u can pull connector and solder both wires together. If it were my car I would NOT do this of course

follow clutch pedal up under dash , should be mounted on a bracket there , 2 wire connector. Can be by-passed as mentioned (test purpose) , but ALSO as mentioned , that is NOT recommended (also won't pass 'safety inspection in many states).