I was wondering the same thing.
I have done other cars with poly bushings and have always been impressed with how much better handling they were versus stock rubber. One thing I found out early on, you need to use silicon grease on the bushings when you add them to your suspension. It not only keeps them quiet, it also keeps the ride comfortable. If you want something that really handles well but is not so comfortable of a ride, install the poly stuff dry without any lubricant.
Tom L.
66 230SL Auto