You can look in the LS swap section under Engine & Drivetrain and find a wealth of information. I read almost every build thread I found in there before I started mine. I could make you a list of the things I had to get for mine, but I'm sure I would leave something out, plus I'm sure I still need some things I haven't thought of yet. This is a good thread, I read it a dozen times.
http://67-72chevytrucks.com/vboard/s...d.php?t=377348 Good luck with your swap!!