Replacing dash light bulbs

Ok, some clarification. Do you have lights on left and right of speedometer that vary brightness with the dimmer? Those 2 and the one by the ammeter are one circuit. That same circuit feeds your shift light, radio light, HVAC light and ash tray light. Other than the shift, are all the others working? You can check the shift circuit by opening the connector to the right of the column and check continuity back to the bulb. I'm looking at a 74 manual, should be flat 8 pin connector. One end has 2 reds on one side and 2 blacks on other. 3rd position is orange on both - They are the ones you need. The other side should check hot with the lamps energized.