Thanks for your input. Unfortunately I doubt that that's the reason for the height difference. Every good spring manufacturer knows how to make a spring stiffer without changing ride height. If you shorten the free length, but increase the diameter of the wire slightly the spring will be stiffer, but the static ride height will remain the same. In fact most of the lowering springs on the market will not only lower the ride height, but will also increase the spring rate. I need to examine more unmodified cars to determine which of our cars is most typical. I know that I would be reluctant to lower mine any further since I live in a rural area where the roads aren't always the smoothest. Some railroad crossings can be pretty harsh too.