Well, to tell you the truth, the brackets that came with my grill didn’t adapt well to the 3-inch body lift. So what we did was take the two lower arms (the pieces that bolt to the lower part of the grill guard) and welded them to the frame. Then, we welded 2 L beams from the frame straight up. They were 9 inches long. Drilled holes in the tops and that’s what we bolted the top arms to. I know this sounds kind of permanent but I can still unbolt the grill guard from the arms for full access to the front of the truck if needed. Also, now that it is welded to the frame it is much stronger. I really couldn’t give you step by step instructions because I’m sure each grill guard is slightly different. Anyways, I hope this helps.
Peace