This is going to sound at least dumb if not crazy But here goes. Can you run two tachs on a car with splices or a double wire hook up. The reason for my ? is I have an Auto meter tack in the dash that I cannot see all that well.( 4spd) It does not have a shift light or any thing like that. The other that I took out of the race car???? is kind of a cheapy but looks real nice and does have a shift light. I have a MSD box so can I tie into that or not. Will the thing read right or will I think I am driving two 2, 4 cylinders. I have seen some wierd stuff with the Sun tachs and was wondering By the way I replaced the cheapy with a Phantom Monster so its not like I squeak when I walk , regardless of what my wife and her brother in law says.