I have a hard time putting what my eyes see into words, so let me see if I can explain it better. Where the 7 and 8 ports meet at the plenum, right there I would take that wall and lay it back.
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Maybe this will help. Where the black is, I would lay back until you get the opening bigger and get rid of some of that turn. If the end result is a very sharp point where the two ports come together, just put a radius on it. Where the red is I would go in there and pull that down and get that big hip out of that area. Where the blue is I would pull that back towards the number 7 port. I would start by grinding on that common wall between 5 and 7 on the 5 side and move that hook out. I hope that helps explain it a bit better.
