Here is what I am planning and I just wonder if anyone else has done this yet? I currently have a Superlift 4" suspension lift with rear blocks and I also have a 3" Body lift (body lift has to go). I will continue to use the front 4" springs and add the Extended Shackles for a total lift between 5" and 5.5". For the rear I am ordering the 5.5" heavy Duty Superlift springs. I think this should set me about level front to rear. What do you think and has anyone else done this?