[mwrbunny]

tomp, I checked out your link to the adjustable spacers and they look interesting....but I'm wondering if the H2 has a rubber boot that sits between the stock coil and top of rear trans-axle....where the coil "seats." (there was on the Suburban, so I might assume there is also one on the H2)
I think it's an integral part of reducing noise/vibration in the cab, and should be retained between the spacer and coil. Looking at the picture of the adjustable spacers....it doesn't look like the stock boot would fit over them. Maybe you could cut/modify them to fit or fabricate your own.... or maybe the manufacturer provides one? On the Suburban, the rubber boot completely elimniated metal to metal contact between coil and seat....and potential vibration. When I installed the suspensionmaxx spacers, they utilized the stock rubber boot.