273/ 2 barrel camshaft options

Check into Brian Salter Racing video and David Vizard Powertec 10. Good chance top winning racers do this, but any advantage they believe they have they are reluctant to divulge. They will talk about things that are kind of obsolete or otherwise we'll known among the upper echelon group.
Deburring sharp casting edges isn't a bad idea but so far below the piston travel I have a hard time believing would be any benefit.