Previous owner installed toggle switch

Is the neutral safety switch properly connected? Will the engine crank "in gear?" Try it CAREFULLY with your foot on the brake!!!

If theft, that is a poor idea. Anyone who knows ANYTHING about an old Mopar knows you just jumper the relay......you can use "anything" metal including a nickel or penny!!!

You have a tach? "Or not" one effective theft prevention if you have a conventional ignition (NOT MSD/ CDI) is to put an unobtrusive switch to ground your tach wire.

Another.......if you have an electric pump......is a switch in the pump relay

If they show up with a "rollback" or a wrecker.......you need a wireless alarm system.