Radio questions

[IwanaPinz]

It looks like by the presence of a radio antenna mount that my 712M had a radio at one time so I have a few radio questions.
1. What type of radio would have gone in a 1973 712M?
2. Where would this radio have been mounted?
3. Where might I find this type of radio?
4. How much would this radio cost?

Would this radio get XM or Sirrus?

Thanks

Brian
1973 712M

[Pinz Enthusiast]

well I can answer the XM & Sirrus question.......NO, being 1973 XM and Sirrus were not around then, wondering if you are talking about the hole on the driver side front body panel, I have seen pics of others who put antennas there, but not sure what it was originally for.