Has there been a break in attempt? What is the plastic part that appears to be broken?
Here's another recent thread regarding steering column lock issues.
http://www.allfordmustangs.com/forums/4-6l-tech/897562-help-key-just-keeps-spinning.html
If the key is stuck in the ignition, HOW did you get the cylinder out? Or are you saying that the key is stuck inside the lock cylinder?
One possible way out of this is to call a professional lock smith. They do house calls as well as having the tools/parts needed to re-key a new lock cylinder should it be needed. They can also help with trouble shooting.
It might also help to remove the ignition electrical switch to see if it operates correctly without binding. IE part of this problem is to figure out exactly what is causing the binding.
Bottom line. IF the steering wheel does NOT lock when the key is in the lock position, then something has broken inside the column.
There's a fairly detailed set of instructions in how to disassemble and repair the steering column in the Ford service manual. If interested in getting a copy for yourself I maybe able to help. PM if interested.
Another option is to just get a salvage yard column to replace the whole column. Recommend that any replacement column come with a functioning key. It's sooooo much easier to swap the lock cylinder when the cylinder works. Of course this assumes that there's a problem inside the column and not with the lock cylinder. Check car-part.com or LKQ for price and locations near you.
If the problem is with the cylinder lock itself, it's so much easier to have a locksmith re-key a new cylinder to match your current key cut. Reuse the current key to avoid PATS re-programming.
