Our 54 3100 has all its original gauges. They all work except the gas gauge. The trucks been converted to 12 volt. The PO took the sender out of the tank and threw it away. From what I have read it's a 30ohm that's what I ordered and instead of using a runtz I purchased a 12volt gauge quadrant. Is there anything I need to know about installing this gauge that will make it easier? I see a hole in the floor with a grommet is that how the wire is routed to the gauge? Gas tank is behind the seat any help is always appreciated and thank you. Steve