Spent about an hour on 1 runner today. Just ported it close enough so I can go in there with a sandpaper roll and clean/smooth everything out then polish. Have 3 more runners left to port before that though. Outside black line represents gasket. The exhaust flows up the runner so porting the upper part is critical to almost match the gasket line. Porting the lower part of the runner isnt as important as the flow of exhaust doesnt ride this wall has hard as the other but opening up overall space for exhaust gases to pass because of over sized valves. ALso, took down the divided alot to help everything smooth itself as it exits. Here is a ported runner to a stock runner compared side by side to give you an idea how much material actually got taken out. Work still in progress but I am hoping by Sunday, the head will be done that way I can get this thing torqued on.