Check out this writeup on it:
http://www.monterosportonline.net/?page_id=261

I did this on my Jeep ZJ a few years ago and it only took about an hour. It would have taken longer if I had rusted/broken bolts, but I got lucky. If you have nasty rust, I would buy new bolts and replace them once you get them out. If you get them out, there is a good chance that you will need to replace them anyway.