The sensor for my temperature gauge does not fit on my engine. I have a 1951 truck with a 1956, 235 engine. My gauge has a sensor that screws into the head. The engine has a sensor with two contacts on it. The gauge unit sensor is too small to screw into the opening on the head. Does anyone know if there is an adapter that will allow me to screw the sensor into the head? If you do where can I get one?