[Bob Mulry]

I don't want to get techie, but...............

If you look at your lower control arm the spring is located approximately mid-way between the ball joint and the control arm inner pivot point.

This means that the force applied to the ball joint, will apply approximately 100% more force to the spring because of the reverse mechanical advantage of the ball joint / spring location..

Spring rate does not tell the full story of ride height changes....

So if your front weights 1500 lbs., each wheel has 750 lbs. weight at the lower ball joint. With a ratio of 2 to 1 a 150 lb. spring rate would be compressed about 10" and a 200 lb. spring would be compressed about 7.5" and a 300 lb. spring about 5"...

Just my 2 cents..

Bob