When I looked behind the front kick panel I couldn't find the harness it plugs into. I didn't really want to dig out the wiring either with that being said, because I don't know much about it. Maybe I am wrong but this harness appears different. The rear box does have amps with it, where is the front amp located anyway? Thanks.
The front amp would be located in the middle of the dash, directly under the stereo. There is an extra harness that runs from the front amp, down the drivers side under the door sill plate to the rear amps. There might be another harness for the rear amps that plugs into that. (at least it seemed like there was in my convertible)
So this one goes up front to the stereo: http://www.ebay.com/itm/94-95-96-97...t=Car_Audio_Video&hash=item1e8829f4bb&vxp=mtr
sorry late too the party, as he shows there are more then a few hrns's that are needed from the dash/body that can be a pain to get. I think my parts car still has them and I could pull them out if you want. If I were you, keep the rear enclosure for the rear speakers, get some better aftermarket speakes to put in it and run it off of the deck power.
The mach was a great system for its time but I would not go through the trouble of putting one in now unless you are dead set on the stock look. The amps are starting to turn up bad in the past few years and starting to kill more batteries and the speakers are all paper cones that if they have not started to rot yet, they will shortly