Bite the bullet and convert very simply to neg. ground and your probs
disappear. I, too, have a 67 BGT Special I'm restoring and one of the
things I wanted to have in the car was a CD deck in the back. This was
after converting my 64 B roadster to a cassette player but with knobs!,
not pushbuttons. Pioneer makes some very nice units that fit without any
Makes for a modern sound in a period machine. Can't beat that. Purists
need not read. And that's fine, too. Go with the pos ground and enjoy.