To give you an idea of what's involved in a frame swap, take a look at this thread on another site.
WARNING! this isn't the show quality way that many would try to accomplish, and it's NOT a mopar chassis. The guy is doing it all himself on a budget and has documented it well. It also has a lot of pictures, so it's not dial-up friendly!
If it loads slowly, remove the "&showall=1" at the end.

http://www.jalopyjournal.com/forum/showthread.php?t=346922&showall=1