Just went through all of this. The neutral safety switch and clutch safety switch tie together, it is a red/blue wire that normally goes to the ford starter solenoid. If you trace it back, it splices into an 18g white/pink wire from the ignition switch, run this to a separate relay that will go to the starter, I will post my thread on the wiring, it is very simple to do actually.
This is my thread it should answer pretty much all your questions about wiring. https://ls1tech.com/forums/conversio...sion-guys.html
Edit: Just realized the correct picture was taken down. The only difference from the drawing on the second page, is that the white/pink from ignition switch to starter, runs through a separate relay first.