I'll be the first to tell you that a 2" DIY is going to be a PITA, unless you get something like a "bolt extender" for each bolt. Some way to screw on extensions to your bolts for the very same reason that TN Tracker stated.The bottom of the top bolts will hit the head of the bottom bolts. Sure, you might think to yourself, you can cut them, but the body bolts themselves do not have threads all the way up the bolt.
Plus, if you cut them, you'd be ruined if you couldn't do anything more with them. And if your 2" doesn't work out. You'd have to recreate some kind of body bolt.. (already done that, and know what it takes).
In any case, I DID put a 2" on my truck, and it ended up being more like a 2.5" because I had to put enough spacers in there so that the bolts wouldn't hit each other, and so I would have enough thread.
http://www.whitepineclub.com/members/kd7hcg/pictures/bodylift/sorry about the pages.. they haven't been updated yet and are a little ugly. The Back and Next for more pictures is at the top of the page.
[EDIT: it's being fixed now]
IMHO I would go with a 3" and follow the article, or buy a 3" body lift.  (I did hear from Speedracer7c that the Calmini one might be a PITA though!

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Heather