theres a lot of ways u can drop a truck
using kits like belltech and the others
if u want a 2/4 drop well all u need to worry about is droping the back because ur front struts are adjustable up to i think a 3" drop but 4 sure a 2" and the back u can either do a ghetto cut a leaf off the leafsprings drop it like that or flip the axle n do a lowering block kit on it using lowering blocks u can buy them at AutoZone for around $35