coilovers are not to bad with getting the height right. You measure them all before locking them down to make sure that they are even and where it is advised to set them in order to get stock ride height. Then you measure from the edge of the fender down the center of the wheel to the floor to see how close you are. If your pretty close you just ride around the block to seat the coilovers and check again. Then you make adjustments on all 4 corners depending on if you need to go up or down to get your desired height all the way around. The trick is to do each one independently instead of like dropping both fronts an inch or up and inch because one side is off. I love them and they are so worth the money. Couldnt have my Z any other way now.
"torque gets you off the line...& hp gets you over the line." - TTKeeper