Going to try these

Joe Mondello designed and developed lots of burrs over the years (and valve seat cutters too). He had and loved one that you could reach into the port and shape the short turn. I’m just the opposite as I like to flip the head over and work the shortside from the valve side with the short turn facing me. He was the expert and I’m a shade tree head porter but there’s always more than one way to get to the finish line.