boomerang shackels will move your spring back a little bit and give you a better shackel angle and clear the body mount better. you could use regular ones and see how it works out. I'm using ruf but i was ifs so i had to put a hanger on which moved it up a lil bit. I also did my frame tubes a little lower then most and I have a ok shackel angle.
ps my trucks a lil to tall because of the body lift.
