Ron there is a member here who did the same swap in his driveway. He swapped suspensions between a 2wd truck and a 4wd blazer. It seems like it was all pretty straight forward while having both of the rigs there. It seems like the only things he had to build were driveshafts. There's a build thread here somewhere on how he did it with tons of pics. I want to say that the original poster was in the service and is now overseas somewhere.....but I really don't know.
Edit:Ron , The members name is sixty8c10. Here's the link for ya!
http://67-72chevytrucks.com/vboard/s...d.php?t=168231