On a flathead Ford V8 since there are two separate water systems a lot of people run two temp. gauges. Would it be possible to run through a switch and have two electric sending units wired into one gauge? I don't have anything but mechanical temp gauges and I am not that familiar with electric. I don't think I have ever even wired an electric one in. It would be on a blown flathead with an alternator and serpentine belts so I an not worried about the period correct thing running an electric gauge. I am thinking there might be feedback from one side to the other.