Ok, the fact that my friend (who works at an auto place) will let me return the add a leafs if I don't like the way the truck sits after install has pretty much made up my mind that I will try them. My question is though, has anyone used either the Superlift 2500 or 2300 "kits"? The 2300 is more expensive, and is a "long" spring...it goes under the main leaf, whereas the 2500 is short, and goes on the bottom of the pack I assume.. Superlift says the long spring is "better", but I don't quite see an advantage one way or another...the long spring has more surface for the other springs to lay against, but thats about it. Also, not sure if it will fit or not, but the long spring would have to fit in those small clamps GM used for the top few leafs in the pack (to keep the springs from slipping to either side I assume)...I *think* theres enough space for an add a leaf in there, but does anyone have any experience with that either? Superlift says it comes with the center "pins" for both sides, which as long as its correct, makes it a bit more appealing as well. Apparently those should add up to about 2-2.5", which will bring the truck right about level finally. Again, with the money back guarantee from the local shop, I really don't have to worry about whether the height ends up right, all I've lost is some time if I don't like the way it looks. Anyone got any input on this? Short or Long add a leaf, Superlift products ok, and would the long add a leaf fit inside the stock leaf spring clamp?