I want to upgrade my stereo in my 97 GT with The Mach 460and realize that I have to either re-wire the speakers or by-pass the factory amps to use factory wiring. I did a search but got confused on the actual location(s) for by-passing the amps. How many locations are there to by-pass? How many adapters do I need? Where is the best place for the cross overs that come with my new speakers? Thanks for any help you can provide.