the front springs on my burb are arched up. My question is, how much height would rear 52" springs give if swapped in instead of 4" lift springs. I have a 4" shackle flip for the rear, could this be done for the front somehow. I see alot of BUILT rigs with shackle hangers at the very end of the front of the frame for better approach angle (I guess that is what it is for) but not sure what the springs attach to on the back side of the spring. It couldn't be another set of shackles could it? I don't know. Just been thinking.