Re: single DIN stereo faceplate questions on a 280
i bought the faceplate from MSA. this is the same faceplate available from stereo shops. i did have to file it quite a bit to make it fit right. i talked to some stereo shops, and no harness adapters are available, at least on an '80. the only wire i used from the original harness was the power, so an adapter wouldn't have done much good anyway. the other wires are for the tape deck and the fader control, which you won't be using with a modern head unit. I had to wire battery power, ground, and new speaker wires.
Casper