I have true duals and want to install my air fuel gauge, i would use an air fuel pigtail zz p sells for my 3.8 that hook into the pre cat sensor and has a wire that the air fuel gauge wires to. will my gauge get an accurate reading if i do this? since i dont have a y pipe that each header pushes exhaust through. will i get an accurate reading since it would be just reading one side, how can i make my af gauge work?

 

I would use a switch to toggle between the left and the right O2 sensor.