Yea, I just went and did this. If you have the money and a place to get a 90-91 cluster, go sell yours, switch it or something and get the 90-91, they look better in the car, because they will actually fit. But if you are like me and don't have the money or a place to get a 90-91 cluster, you can check out my site,
http://www.geocities.com/twisted91civic/ , I have a wiring diagram up there for switching them.