You'd need to compare the pcm pinouts. I'm surprised the trans connector is different, my understanding from the posts was that it was the same connector and you may be able to swap pins... Unless you are talking about the black block at the back of the trans, that's the range switch, which is easy to take off your old one and put onto your new one.
use this to find out how to line up the switch when you add it on.
http://www.grandprixforums.net/how-a...ion-49297.html
Or get some extra trans connector pins and add them in for the internal switch. But I think you still need the external because your starter soleniod is routed through it.