Do the shackle first and see how it sits and rides. Do not pull a leaf until last resort,it will change the your driving characteristics if you pull wrong one . Your front was setup to accommodate weight and dd use,by using v6 springs and moving front hanger forward. The problem with off shelf lifts is they are designed for one thing,crawling. The street manners suck,you jam on the brakes and you bounce off your bumps if you have them causing you to unload your front brakes and loosing stopping power. It's a very fine line between dd and crawler,good luck