I got my Rebuild running this Week. I had the Camshaft Oil Groove deepened to .035 as suggested in the Y-Block Book because most of the New Cams don't have sufficient depth from Factory. I also had a Set of Schumann's Cam Bearings installed with the External Oil Groove on Centre Bearing. I may have to restrict the Flow to Head as too much Oil can't drain fast enough. I did this last Time by tapping the Shaft stand and putting in a Pipe Plug with Hole drilled in it. Problem solved. How big a Pipe Plug do I need and how big Hole to drill in Plug? Can't remember from last Time. TED? Thanks!