First off, an A9P IS an auto computer, but for an AOD - it doesn't actually control the AOD, it just has a different calibration. Your computer actually controls the tranny, so you can't do this. And if you even wanted to do this, you'd need a harness adapter, an A9P EEC and a Bauman tranny controller. You'd be left with a stock EEC, loss of fan control and a much worse way of controlling your transmission all for lots more than the $500 you do not wish to spend.
If I wanted to, I could do a chip for your current processor that would almost exactly mimic an A9P, but you are much better off getting a calibration for a 94-95 - you need it with that E-Cam and an auto. Mail order chips (from us) with 4 programs are more like $300. With that you get a perfomance boost, better idle and an improved tranny.
Hope this helps,
Don