It does have the fender tags, been years since I looked at the decode i have of them, but for some reason I was thinking radio options weren't on the tag. I'll have to dig that out of my files.

***edit***
And just to avoid going down a rabbit hole unnecessarily, I'm not concerned with whether or not the car should be radio delete, I want a radio and its too far along to turn back if I was that concerned with it. I just want to make sure I don't hog out the hole if there's a legitimate factory antenna other than the commonly available one to put in there. Oh, and it's a 71 to those asking