Heya, I have a 71 Jimmy and got the 4 inch TC HD lift from yall. I have been playing with it lately, now that it is running, and it does not seem to really articulate that well. The set I got has 4 springs and seems pretty stiff. Do I need to loosen up the spring clamps to get a little more travel? Is there an optimum shackle length that is needed?? At rest, the shackle is about vertical, is this right? Thanks for your help.