Slant 6 Turbo 68Dart Project
I read up on it over and over and there's a lot of different "Ways" but basically all you are trying to accomplish is have the whole car shut down when the switch is turned off. So I am going to try hooking the relay to the alternator field wire, so when the switch is on, it allows the alternator to stay connected to the system, and when it disconnects, the alt should discharge to the battery and then it will be cut off from the system.
Some people skip the relay and just run the alt charge wire all the way back to the battery, so if the switch is disconnected, the alt sends power to the battery, but the battery is now shut off from the system, so so is the alt.
I've read about 10 different methods to do it, and they all seem to "work" The relay just seems the cleanest.
This is where my idea came from:
http://www.timskelton.com/lightning/race_prep/weight/battery_relocate.htm