Factory sunroof cars were built as non-vinyl top hardtops, then sent out to be converted by ASC. All sunroof cars recieved a vinyl top installed by ASC after the sunroof was installed. They did not use the factory chrome trim around the bottom of the vinyl top, but rather a glued on type trim. They are a full standard vinyl top, I've never seen such a 1/2 vinyl top on an E-body car before.
I'm in the midst of restoring a 70 R/T sunroof car now, it's at my friends place being blocked and final body prep before paint. Factory white car with blue interior. Most of the factory sunroof Challengers you'll see are loaded up cars. This one i have has A/C, power windows, 6 way seat, AM-FM, rimblo, console auto, rallye inst package, power brakes and steering, cruise control. 383 /727 package, even has a rear sway bar. Two fender tag car.