I'd say look into the whole kit. There are advantages to a kit that someone elsae has spent the time to work the bugs out on. One thing that took time (and $$) was playing with the different spring rates in my XJ. When the rear coil kit first went in, the truck was out of balance. Front was super soft, rear was somewhat stiff. It would cause the truck to pitch at the nose down to one side at times when that was not so desireable. Took a bit of testing with different springs front and rear until I got the truck balanced.