Steve,
Good question! Answer is not so easy.
I had not driven my car in 15 years so I cannot remember how it rode "before". My guess would be that you would not notice the change in ride comfort and handling. If you are a serious autocrosser, you might have a "calibrated butt" that could detect the change. In any case, I would install the GNX bushing to tie the frame and body together better. If you car has 100,000 miles plus and has been "used and abused", I would strongly consider new bushings and since the poly bushings are less expensive than stock bushings, I would go with the poly bushings.
Conrad
Note: The GNX bushing is available by itself. If you buy the Energy Suspension body bushing kit, it contains the GNX bushings.
PS. The bushing are a pain to install as you must lift the body off the frame to install the upper half of the bushing. Not easy but doable. It would be a fairly easy 2 person job. I did it myself and it was frustrating.
PSS. Steve, AOL will not let me respond to your e-mail. I live in Albemarle about 45 minutes NE of Charlotte. E-mail your telephone number and I will call.