Measuring is pretty easy and once you do it you can write the numbers down for future reference in case something changes in your suspension. Use an eye/eye turnbuckle that can adjust between the ride heights you are looking to measure and you are good to go. Something similar to this but make sure you get the right length:

Keep in mind that you should measure with same amount of fuel in your tank each time because the front end does move a bit with the weight change. Porsche stipulates measurement at full tank, so that's a good way to go.

 

96C4S with M030 kit and Bilstein PSS9 dampers.

 

Here is one more with bilstein 10s.

Op don't have to worry about being to low. Plenty of adjustability. I've set mine as low as I could without rubbing. Took a bit of fiddling to get it done. photo150.jpg

 

Nice looking cars in this thread.

 

Koni Yellow's and H&R springs. Walrod lower control arm bushings, Rennline adjustable toe arms. Not sure what the right hight is at but I think it is a full low in front and the rear doesn't have adjustments.