Have a 67 R.S originaly was manual transmission and was converted to automatic transmission. What wires do I need to find to make the nutural switch work? Any suggestions would be appreciated.

The "start" circuit from the ignition switch to energize the starter is a 12-ga. purple wire; you need to cut it and splice two wires from the cut ends down to the neutral safety switch on the side of the floor shifter. When the shifter is in Park or Neutral, the switch will complete the circuit between the two wires and allow power to flow to the starter solenoid. graemlins/thumbsup.gif

The wires you're looking for should be attached to a safety switch on the clutch pedal (or where it was)

There aren’t any neutral safety or clutch safety switch wires in a 67 manual transmission car… You would have to add the wires to the harness for a safety switch.