Rallye Dash Radio

I have 2 1970 340 Dart Swingers.
The problem is that there is 2 different radios in each car.
One has a thumb wheel radio ( which looks original to me) and the other has a knob style radio.
Does this make sense?????
The 2nd car has an after market stereo in it so I am going to have the dash restored and start looking for a knob radio.The dash looks like it's been butchered a little so I want to make sure .
Any opinions?
Thanks Dennis