I was in the same boat when I started. I couldn't find any threads with pictures of various components, so it was hard to gauge how low I was going to be when aried out or at ride height. So I bought components in stages, and took pictures after each parts change. You can look at my build thread (in my signature) or at the thread below that's specifically about this topic.
http://67-72chevytrucks.com/vboard/s...d.php?t=609897
Here's the chart I eventually came up with.
Good luck & let me know if I can help any more. - Matt