We were talking about this forever ago, for the trans am at least (which has the bulbs behind the gauge cluster, and the light seriously just bounces off a piece of plastic in front of the cluster) benefitted greatly from the increased brightness.
Although I believe there is a bulb in the radio that still needs replacing.
They dont really dim how they are supposed to with the factory switch, but the very idea of them needing to dim is absurd. The interior lights I kept incandescent not to spoil the look.
Btw, the car goes into both drive and reverse, and my brake booster is functioning. More updates to follow as i have all day today to work.