What does a BASIC steering wheel look like?
Here's a pic of the wheel in my 73 Dart Swinger. You can just barely see the center piece laying in the floor on the passenger side. It has 3 spokes to cover the spokes on the wheel. It isn't just a "horn button". This is the same wheel as my 73 Dart Sport has. Sorry I can't figure out how to attach a pic of it. I believe they used different wheels in 73 than the 72s had.
Dallas
http://fidnet.com/~dallas/images/dart32.jpg
BTW if you need a pic of the wheel in my 73 Dart Sport send me an email and I'll return one to you.