How "original" is my AM radio after an FM conversion?

In an FM conversion that uses the module from Antique Automobile Radio, the appearance of the radio does not change from original, as the module uses the original tuner, push-buttons, and volume/tone control in it's interface to the new system , so that the radio basically operates the same as it did from the factory, other than now, it will have FM in addition, and an audio input for an Ipod/MP3 player to play your own tunes on your "new" radio.