I am setting my Gen II 33 Hot Rod up to run both the hard top and the roadster windshield. I have installed heat/defroster and AC (for extending the drive season with the hard top). I found the plenum for the defroster prevents the center mount stud for the roadster windshield to be used without modifying something. After weighing all options I am modifying the plenum to accept a stud to come through it.