Terry,
I have two original chevelles and both have a semi-gloss color on the dashes, one green and one red. According to my PPG/Ditzler paint chart for 69 Chevrolet, they list two different low gloss paints for you components in question. For the "Upper instrument panel (exposed areas)", use Ditzler paint coded 9317, they call it an "O" gloss (flat). This is the area between your dash pad and windshield. For your other parts in question (glove box, steering column) they call for ditzler code 9266 which is supposed to be a low gloss color. I am not a paint expert by any means, but I'm sure that if these exact paints are not available there will be a cross reference. As you are probably aware, there are a wide range of gloss levels, bottom line if you don't want to spend too much time trying to figure this out, use a semi-gloss black on everything below the dash pad and something a little flatter between the dash pad and windshield. Hope this helps. Woj
P.S. If you want to make it really look authentic, throw in a couple of runs.