I took mine out a couple years ago to replace the dash pad and also go through everything else while it was out.
It was my first time and was pretty simple. And it takes an hour or so (at least from what I remember) to locate and remove/disconnect everything required to pull the dash.
So if my memory serves me right...
Remove everything you can first. Glove box, ash tray, lower trim, anything to make it lighter and easier to handle.
Disconnect wiring harnesses to the steering column and firewall. Disconnect climate control cables at the control bezel.
Remove 2 nuts to the steering column under the dash so it will lower some and relax.
There are 5 1/4 bolts (if I remember right) towards the front of the dash that mount to the body. Remove them.
Then one nut under the dash on each side (can't remember the size), one behind the glove box and one to the left of the climate control bezel. These two nuts just need to be loosened only, the dash rides on the studs and serves as a tilting point (at least from my experience). The dash assembly can be pulled up once everything is disconnected.
I'm sure I'm forgetting other little stuff.
Here is a few pics in a thread on my build. it doesn't go into full detail but gives an idea of the process.
And windshield stayed in the whole time.
http://www.cuda-challenger.com/cc/index.php?topic=97175.45Hope that helps.
Tom