Cutting the coils will not get you what you want, best bet would be to get the proper drop springs and do it right the first time. Cutting the springs will alter the rate, both from coil removal and by changing the temper of the springs from the heat of cutting them. You'll end up with the rough ride that you don't want. In addition, it's difficult to get an exact dimension to cut to get a given amount of drop. You have to consider the spring wear, plus the temper change.
Summit shows
drop springs for your truck. Most of them look like they are in stock and ready to be shipped, should be able to have them within a week at the most.
