My mustang (currently mostly disassembled for resto) came from the factory with a pretty strange spec. It has power mirrors and power locks but NO power windows. Would it be possible to add the power windows to this car? I understand that the regulators, window motors, switches door panels and armrests would need to be replaced. Is the wiring harness in the door correct to support the power windows since it already has the power locks? If not, do I just need the door harness and is it plug-and-play?