[TKat13]

I see what you are doing now; RCAs to the 5 channel amp, then use the factory wiring for the 5x7s, however I am not sure how well that will work with the odd wiring of the mustang's 5x7 speakers.

I do not see in your list a converter plug for the output of the factory amps to the speakers, that would utilize your factory wiring. Personally, it really is not hard to run new speaker wires.

Also, if you are swapping out the head unit and the amps, why do you need the 12v to 5v converter?