Just finished the springs, I have all four perches set for maximum height, the rears have 1/2 inch I can lower them. The fronts have 1 inch you can lower them. I will drive it for a few weeks to see how much settling takes place. I bought the spring compressor from eBay that goes up through the center of the springs. It just barely has the range to compress the spring to change them out. In the rear I had to remove the shock, sway bar and outer arm bolts to pull down to get them changed. The front I had to remove the outer sway bar cap to be able to lower the arm.
You really need two people to do it safely, so it looks like it lowered the car about an inch. So I have some lowering capability left. But getting to the perches to adjust them will be a major pain. The perches fit up in the cups for the springs and the springs will need to compressed to adjust them, also the rubber insulators are not used so I am not sure how much road noise we'll be increased.