Anyone have any experience using Polygraphite body mounts? I am installing a pair of Detroit Speed & Engrg (DSE) weld-in subframe connectors in my '69 vert and am concerned with the performance of the polygraphite mounts. Once I tie the frames together, the mounts will be "permanently" installed and I can not easily replace them. I know there have been discussions here on polygraphite suspension bushings, but I have never heard much about body mounts. I am getting ready to install these, so any warnings or recommendations would be gladly received.

Todd