I remember that thread. I'm pretty sure it was started by TXBill, and his many contributions to Mercedesshop are all gone.
The thread referred to the job that TCane did on his W123, and it was quite extensive. He basically lined the
entire engine bay with insulation. The pictures of it were incredible. Unfortunately TCane is gone from the board as well. Must be a Texas thing.
However, all is not lost! I do know that Leathermang did some of the actual sewing on the project, so he may be able to tell you more about what TCane did. You can contact him by searching for member name "Leathermang."