Anti theft devices

You have a tach? Put an unobtrusive switch to ground the tach wire. Electric fuel pump? Add an inconspicuous switch to kill the pump. Are the holes in the wheels large enough for a chain/ cable? Padlock. Consider figuring out how to lock the hood, not really easy on many Mopars. There are all kinds of little things you can do, but if they arrive with a roll-back or wrecker, you are screwed.