First of all, you're not going to convince me of your leaf spring expertise by posting a picture of an S10 with a rusty poorly built "bed cage". First of all, it's an S10, so we KNOW it doesn't handle well, secondly, pictures don't show shit.
You told a guy asking for advice on what springs to run, to run a stock pack with a longer shackle. I stick by my statement, it's a terrible idea, and not to do it. You're going to buck like crazy and go HEAVY into negative arch. Furthermore, good luck not breaking something in the meantime. As for your last comment, I could have fun in the desert on a big wheel tricycle if I had one, let alone a bone stock XJ. You put me in the desert and I can have fun regardless of what I'm in, it doesn't mean I'll be going fast. Leaf springs are actually a very simple thing to understand, most people just don't want to spend the money on them.