(Pat Pardi of Cincinatti, Ohio - where are you now??)
....I have no idea who performed the work, but judging by the machining profile used, I feel it was done with safety in mind. The material was removed from the face, while making sure there was enough thickness to assure there would be enough strength to hold it all together at high revolutions.
Extra care will need to be taken whenever the time comes to get into the bell housing a long time from now, but other than $kevlar$, there is no good substitute for asbestos clutch material.
![[Official Logo]](bcwlogo.gif)