The Skyjacker suspension we used is available with four replacement leaf springs. We like that. Lift blocks, while frequently used in some kits, act like a lever arm when torque is applied to the rear axle. The added expense of full leaf packs is almost always worth the better performance gained. We also opted for Skyjacker’s Hydro-series shocks. Installation of the lift kit (PN JP40KS-H) was about as straightforward as can be. A couple of days before the install we soaked all of Piggy’s suspension bolts with penetrating lubricant. In the end, by some miracle, we had no broken bolts.