I've got a '99 Taurus equipped with Ford's Mach audio system. Was wondering if the Mach system's amp would just plug in to the existing radio/speaker connections in my '97 F150. The F150 has the factory installed AM/FM cassette without any extra amp. If it would, where is the amp physically located in the Taurus? If not a direct plug-in, how hard would it be to wire it in? Thanks for any help.