im sure u no this,but 56" springs r for k30 trucks which have a high weight rating. i would get custom ones made with a softer spring rate or take a couple leaves out of standard 2.5" 56" springs to soften them up a bit or it will ride like a bobcat...but just shop around offroad sites. im sure u can find a good deal. id go with tuffcountry but if u have the $$$ get some made.