I want to install aftermarket electrical oil pressure and water temp gauges on my 98 XJ 4.0. For the pressure sensor should I remove the factory sensor and use that port for the new sensor and if so how do I disable the dummy light? What would be the best location for mounting the temp sensor? I know this is a very basic question however this is my first guage install so any information or ideas you have would be appreciated. The factory Autometer guage instructions only give the electrical specs with no mechanical info. Thanks in advance.