I decided to leave the head alone for the reasons you listed. I didn't polish up there either, as I know the roughness helps w/ mixture before entering the cylinder. All the work I did was just on the plenum to runner side. I also took material off the plenum at the throttle body mating as there was a huge lip sticking up from the bottom side of it. Otherwise everything is assembled and back on the motor.
Sent from my SM-N986U using Tapatalk
