No point in swimming against the tide. I’ve decided, after some research on the Mustang harness, looking at wiring diagrams and pin-out diagrams until my vision blurred and brain hurt, to go with a new column. They’re cheap, they’ll look MUCH better, and I can get one in brushed stainless to match the wheel spokes. Wiring in a new ignition switch should be easy, and I could add a neat-o (but maybe too trendy) push button for the starter.
Here’s the style column I liked. $170 to $200, depending on paintable vs. stainless. No switch, no shifter, no problem.
This column.
Righteous.
Cool McCool's Garage 
That likes real sweet for the money
Brian, I had the same dilemma with my Plymouth. I wanted to keep the factory cruise control, but w a s using an Ididit column and aftermarket wheel. I just went to pick a part and found the stock Dodge Ram switches, and installed them on a little bracket inside the console. Works great, and it’s completely out of sight. Grant also makes a few switches for their wheels
http://www.google.com/search?hl=en&gl=US&ie=UTF-8&source=android-browser&q=grant+steering+wheels#gl=US&hl=en&q=grant+steering+wheels+cruise+control+switch