That harness should work. Do you have the speed density computer as well? Is your motor complete with sensors? fuel pump is the same, but lines are different. Also, there is an issue with one of the rear brake lines and exhaust clearance with full exhaust, if I remember right. A9L, A9P, or A9M computers will work if you get a complete mass air harness or the conversion harness to go with what you have, it doesn't matter what trans you have, it will work, I have an A9P out of a 90 gt AOD in my 93 Cobra, which of course is a 5-speed and it works great. Thats all off the top of my head. Anything else, let me know.
