Hey guys. I have a 2003 F150 Fx4 and I would like to raise the back of it up a little bit. Has anyone out there used these ADD-A-LEAFS? If so, are they hard to install? Do they change the ride? How much lift do they give you? Will I have to change my shocks if I install these add-a-leafs? Overall, what are the pros of using these? And what are the cons? Will they cause other parts on the truck to wear out faster than a stock truck would? Finally, what is a good brand to go with? I know, I have a lot of questions. If you can help by answering a few or sending a picture or two, it would be greatly appreciated. Thanks, Dave K.