Got my car tore apart for a blown head gasket. Gonna check the timing on the car. Forget the procedure but I'm pretty sure is to disconnect the water temp sensor to set timing. Anyways I have a digital advance timing light from craftsman. When using this thing I'm assuming I set the digital read out to 12 degrees and it should show zero on the trans. Is this correct? Lost the directions and can't find them on the net either.