I know this isn't the answer to your question but i believe this post should have been made in the "Suspension, Handling and Brakes" forum. I'm sure once a mod notices it and moves it the right people will respond with an answer to your questions.
I got it done on my car. It's a lot of work if you have never performed this type of work before. The Sable looks great, and it rides wonderful. Stiffer and cornering is at its prime. I just cant wait to get some new Sways in there now. Take a look at my car domain, there's some pics posted up on there. Hope I convinced you!