1968 Z28/RS - How to replace dash instrument light bulbs?

[Chedderboy]

I just picked up a matching numbers 1968 Camaro Z28/RS and bought a few replacement light bulbs for the dash.  Specifically, the dash turn signal indicators do not light up. I stopped by Classic Industries and got a full set of replacements (12) for the dash.

How the heck do you get those in?

Do I unscrew the dash instrument housing (tach/speedo) and pull them out in one piece?

OR

Do I have to go up under the dash (tried, seems impossible)?



HELP!