[All American Racer]

I've seen the polygraphite kits but I am not familiar with them. I guess in my mind anything but rubber would make the ride harsher. For instance, my old 73 had rubber body mounts and my buddy's 73 had urethane bushings. When I rode in his car it seemed like I could feel every bump in the road go right up my back. This was 1986 and I'm sure technology has changed a bit but this is why I'm hesitant to use anything but rubber. Any thoughts on polygraphite guys? Marc