looked at the brochure and standard radio was the am mono. My AM only radio is an 85-86. The radio in the 83 currently is am/fm so I will be looking for the AM radio for it.

Yes, standard radio in '83 was AM (mono). Also in '84 (exc. SVO). Starting in '85 is when the AM/FM stereo radio became standard.

What throws me is, before '85, even though there was a "standard" radio, some cars had no radio code, not even the code for radio credit.