According to the instructions it said wire to the oil pump switch.
Forget that. You should be paying attention faster than an idiot switch. Install a manual switch for if something else goes wrong.
Oh by the way I also wired my MSD hot wire to the oil switch. Oil pressure dies and it kills my ignition.
Same way I did my setup to kill the MSD. Used oil pressure switch to a relay that is also to a light on my dash. If you are racing and do not have you face looking at the gauges or see the red light? Death will result. I have mine setup to turn light on and kill engine. Boss told me about killing pump is not really a good idea with carbs. I have 2 two 750 double pumpers on my engine and I can guarantee you that thing will run for awhile if you just killed pump only. I also have rocker switches for my pumps to kill them. BUT things do happen when racing or running hard and you may not see it until major issues happens to be able to flip them off.
