My Tbird does have its factory gauges, but they have never malfunctioned or shown worrying signs. Not until, not at all exaggeration, I drove it in colorado. I heard I could move the sensor down near the oil filter but that would give optimistic readings and not the reading the OEM placement in the rear top gives for the end of the reverse lubrication I hear my motor has. I could look into a mechanical gauge and see. I do hear that my motor from factory comes with low oil pressure, just odd how I never had such issues till colorado happened. before I moved here I did install a 4 barrel