Not trying to jack a thread but what's the difference between the (other then the look) turn knob and thumb wheel radios? Is one an am only and the other is am fm?
There were am/fm radios of both knob types.
The lower dash pads that were supposed to protect our knees caused a chain reaction of dash changes. The ashtray shape changed so the lighter was moved. The round knob radio wasn't user friendly so the thumb wheel was created.
Federal seat belt requirements meant no "kneeded" lower pads. Those other changes stayed with us.
And the earlier dash house could be used.The ignition switch bezel is a good location for a right mirror remote control wand.