I've never seen it done, but there is an 84 coupe on Ebay with an analog dash conversion. For anyone who's ever wondered about the conversion, here is proof that it can be done:
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2480420783&category=6168
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=2480420783&category=6168