Way back in the mid 1980s I had a quick change Cam Bearing installed. The engine was being rebuilt and it seemed like a good idea. 30+ year later I am doing another bottom end rebuild. I have been reading about the quick change bearing and their effect on camshafts. This camshaft was replaced when the engine was rebuilt. The cam I have been using for the last 30+ years shows no sign of wear on the scrolled journals. I plan on sending this cam and the lifters out to be cleaned up then re-used. Since the cam has lasted this long I feel confotable leaving thins as they are. Is it worthwhile to convert back to a Bush?