A guy I work with done it yesterday to the original radio in his 49 pontiac and will soon be doing it for my 55,its sweet as the dial will light up and uses the original on/off switch along the push buttons for volumn,seek and source.  I will post more after mine is done and see how it works,he is willing to do some if anyone is interested but it wont be cheap as there are parts to buy and its time consuming and you would have to supply a original radio to be cut up which cant be put back to original after he is done.

Butchering up everything I can get my hands on in Dayton Ohio