Here are some answers from what i can remember about them, i've owned one in the past:
1) Every AAR I've seen had rallye wheels, some t/a's came with steelies, so probably a few AAR's did also. I might be wrong on this tho?
2)Yes, all rear right quarter mount antennas, all fixed (no power)
3) there are a few out there, see e-bay or year one or the paddock
4) yes, all black stripes on AAR's
5) again, see e-bay, year one, the paddock, etc...it's available repo
6) same basic grille, but has diff trim than the Cudas, shares this trim with gran coupes IIRC...I'm sure someone has a pic they can post
7) thats a matter of personal taste, I like EB5, FC7, or FM3, especially with white interiors.