If you're going with the IMS front struts, you can set (or raise, if you get pre-built fronts) the coil seats above the standard 213mm setting with or without KDSS. If your truck has KDSS you can also lower them below the standard 213mm setting. That's great info to know up front in case you get a set of coil springs that end up giving you a lot more lift than their marketing specs say you should get, which seems to be fairly common.
In my case, I went with the C59-314 front coils (supposedly a 3" lift with a stock weight truck), but it gave me 4" of lift until I installed my steel skid plates. The front now sits at 3.75" which is at least an inch higher than what it should be. When the temperature dips down, I'm going to lower them to around 2.50" to 2.75" since my truck has KDSS. If I didn't have KDSS I would be stuck with a lift that is way too high.
I originally went with the C59-325 rear coils (supposed to be 2" lift with a stock weight truck) but they gave me almost 3" of lift until my fuel tank skid went on. I always have about 100 lbs of stuff in the back, but the rear now sits at 2.7" in the back. There is no way to lower the rear unless you install shorter coils, so I ordered a set of C59-505 (supposed to be 1.5" lift with a stock weight truck), but that is a whole other can of worms...
Anyway the truck drives great when I'm hauling 5 people plus gear, but if it's just me the ride is rough and bouncy as all hell. I think the IMS struts and shocks are excellent quality, but their coil springs are inconsistent. I suspect if I could test the coils the spring rates would be much higher than the quoted 586 lbf/in (front) and 220 lbf/in (rear).
Just saying, depending on your setup, you might want to opt for springs that are 1/2" to 1" shorter than what Dobinsons says they will be. You can always raise the front by raising the coil seats. You can also easily raise the rear with small trim spacers. If you get a slight rear lean, the trim spacer option is also good to level it out. Dobinsons only offers a 15mm rear trim spacer, but OME has several different ones (5mm, 10mm, 15mm etc).
