If you paint it Base/Clear the base will be flat. The clear is what gives the shine on auto paint. I am looking at the Challenger& Barracuda Restoration Guide and it says the following.
1. 1970 Chall/Cuda had flat black paint on the steering column and dash frame Ditzler Code 9324
2. 1971 - 1974 Chall/Cuda had Semi Gloss on the same parts Ditzler Code 9388
Your local paint shop should be able to mix up some paint according to these codes and it is Single Stage paint.
Hope this helps.