OK I have a friend that did this swap on his 98 hatch (I think thats the year).

He ended up having to switch out the chassis harness for some reason. I believe it was because although the fusebox has the slots in it (one fusebox for all models) there were no wires run for it.

He tried running them by hand a couple times but there were relays and a few other things he needed off the harness that just made it easier to switch the harness.

He ran into issues even after he swapped the harness and one of them being the tach and speedo weren't working for a while.

I a going to try and get ahold of him (he moved) and see if he won't post the gritty little details for ya.