When you go to these shorter stiffer springs and the shorter, stiffer shocks there will definitely be a much firmer ride.

If you want to do it anyway, you can accomplish the same thing with factory parts for much less money. I have posted the MB part numbers for the 124 Sportline suspension. This includes sway bars, springs and shocks. Since you are lowering the whole car, you will need a good four wheel alignment afterward.

Also I think there an article under Cars or DIY above about the entire Sportline conversion. It was done by JCE on one of the most beautiful 124's I've ever seen. I have met John in person and seen the car and was offered a test drive. Unfortunately we ran out of time.

On my car I took a different approach. I bought and put in the Sportline sway bars and used KYB shocks which turned out too stiff, but does indeed give me good handling. If I had the funds I would do the whole Sportline setup and realign. By going to the short shocks and springs I would probably have a better ride than the KYB's are offering, but lowering the car I'm sure would be a great handling advantage.

If you can't find the part numbers and info by searching let me know and I will look them up for you.

Doing the springs and shocks without the sway bars, I believe, would be a mistake. I would either do the sway bars, or the sway bars AND the springs/shocks.

Good luck,