Changed the thrust and main bearings without knowing to seat the thrust. Gold dust was found in the oil after 200. The thrust copper surface on the bearing was worn but not too badly. The thrust surface on the crank looked and felt smooth and new and there was no discoloration of the metal. Installed a new thrust and seated until a tight .008 endplay was obtained. Still have gold dust and LOTS of it! If driven easy, very little gold dust. If I romp it, the thrust seems to push forward against the rear thrust surface and try to eat it up. Am I overlooking a critical step in the procedure? It appears that the rear thrust surface on the crank needs R&R, but like I said, it looks/feels like new. Any suggestions appreciated. Thanks.