http://www.automotiveforums.com/vbulletin/t138795.html
Here is the link the thread.....

I dont know exactly how to put them in but DONT try to pull the needles off the stock gauges (they WILL break)

yeah don't pull the neddles off i learned the hard way and bought a new gage cluster, the gages slip right over the neddles, and on the tach and speedo, there are some small screws that hav to come off and screw right back in to the new gages.