I have been surfing for a while for the corect info to install a Alpine deck, bypassing the amps, into a 94 GT convertible with the Mach 460 system. I thought I had it figured out buying a Metra 70-5514 wiring harness, then Metra tells me that theres no harness for the 460 system because of the 3 amps. Crutchfield tells me to get the 2 piece harness with the rca jacks. According to them if I use the grey plug and plug the speaker wires into the rca jacks on the Alpine it will use the car amps and not the Alpine amps, not overloading the system. I am about to hang it up and save to replace the entire system, but after all this would prefer to salvage what I have. Can someone please point me in the right direction.