Love what you've done to your Challenger I have a 1970 B5 blue fully optioned Challenger it has power windows and sunroof, suregrip 3.25 8 3/4, aircond, cruise control, 6 way driver's seat, rear window defog, ralley dash, painted racing mirrors, console auto but only a 318 (matching). Anyway I just want to let you know you can get the original switch for the sunroof Bosch is remaking them the same switches are also used in early BMW's for the power windows. I had a crappy generic switch in mine and found out about these the part number is 0 343 302 003 they are available all over at parts stores and are cheap. As for the coupling there is a guy selling them on Ebay for about $10 I got one as a spare.