I've been wanting to know the size too! I've asked once or twice and haven't gotten a response yet.

There are 6 bulbs that light up the 4 gauges. One each for the temp and fuel and two each for the tach and speedo. Also, you don't need to tear into the cluster if that's what you meant by that. The bulbs are in plastic nuts that twist in and out of the back of the cluster To get the cluster out just undo two screws on the bezel and pop it out and then there are four screws holding the cluster in. Just carefully pull it out and the bulbs are in the plastic nuts on the back.

Any idea where i can get those in blue? besides the net? What are the HVAC light size, and how many?(the heating and vent gauge cluster)

too bad this kid hasnt been around for eternity...

Canadian Tire did a lookup and got me a bulb that didn't fit, Napa did a lookup and got me a different bulb that didn't fit, then the Dodge dealer did a lookup and got me a 194 bulb that didn't fit.  Apparently, in the 95's at least, only the high beam and cruise indicators are PC194s (the grey sockets), the rest (black sockets) are smaller and turned out to hold Mitsubishi part MB066068 (hurray for KW Mitsubishi!) which fits.

I also got a cluster out of a junker yesterday and scored many more bulbs, including one for an "O/D Off" indicator I don't have which is different yet again.  Good thing too, when I was putting in the Mits bulb tonight I thought to meter out the rest and found three more that were gone...  damn my dash is bright now.