easy
Buy an EX/Si cluster. Remove the couple of screws holding the plastic strip around the cluster. After that pry gently so that you don't break the clips holding it in. Then that gives you access to the screws holding the cluster in the dash. Unplug the cluster, and plug in the the EX/Si cluster. Put it all back together. That's all there is to it. Mine works for me, including the tach. PM me if you need more help than this.