I used this unit in my 70.
http://www2.cougarpartscatalog.com/secretaudio.html?attribs=79
I hid the main box in the trunk and mounted the control head in the console where the ash tray is.
My only complaint is the remote control is round and the buttons are symmetrical making it hard to tell what way you have it in your hand after dark. I mounted it with Velcro to the front of the box on my console and that way it is not a problem.