FYI - I stumbled across this guy looking when I was looking for alternatives to adding an AM/FM/CD indash replacement to my sons Cutlass. The holes for the volume and tuning controls were wider than modern stereos.

http://mysite.verizon.net/msn7c0vo/r...2005/id10.html

 

The Parts Place has factory radio delete plates if you need one for a restoration project. I stumbled across them while looking for dashboard parts.
http://www.thepartsplaceinc.com/home.asp