I am trying to run a gauge cluster from a 1950 Studebaker in a 12v system. The problem I am hearing now is that the Stude gauges were 6 volt +ground, and now I have a 12volt -ground system. The gauges are Stewart warner gauges in a 5 inch cluster. I am only doing the temp and fuel gauge. What can I do to make these work on a 12v - ground system. Any help is appreciated.