Nope. Different tranny altogether. The one in the GT is a non-electric AOD. The one in the 4 banger is the same as the ones they put in Thunderbird Turbo Coupes, Rangers and Aerostars. It's known as the A4LDE. IIRC, they also used it in Exploders in the 90's. It is almost completely controlled by the EEC.
Which wiring harness? EEC? Yes, it's different. Body? Should be "close" to the same. (The interface for the "body" to "EEC" harnesses would prolly be different.)
its all good. my fault, evidently the research i did prior to purchase was very incorrect. i tried talking the lady into going a full 5.0 swap, but **** with these crazy gas prices, having a 4cyl fox wouldnt hurt... when its fixed, i told her we might as well dress it up and call it a day... thats it...