Instrument Lights to change...

There are only 4 bulbs in the rally panel for illumination. The other 4 ( 8 total ) are indicator lamps. Because 6 of the 8 are scattered around the tach, breaking adjacent sockets is easy when reaching in from underneath.
Procedure for removing the panel is in the service manuals through 72 edition. Everything about the panel is fragile. 8 new bulbs and sockets will be a little expensive. I consider it money well spent.
Hope this helps