With the number of J seats on the 77W I'd be very surprised if you didn't clear, but equally I'm not sure quite how the 31 part of the plane is going to look in future.
With the toilets moved to where the old crew rest area was that leaves a clear run for seats straight through the old toilet space.
You'd have to guess that 31 is still the best row to have as there will still need to be a space by the emergency exit there, but I'd love to see a photo of the layout in that zone.