ok i bought a water temperature gauge because the one in my car stopped working...i looked at the instructions on how to install it and i dont know where a 1/2" NPT fitting on the engine is...also the thermometer is like 2 1/2 inches long, where would that go without hitting anything or not fitting? the gauge is an autometer lunar 2 1/16" gauge...i just need help on how to install it or how anyone else has installed their gauges...