Ah, OK. So the GOUT mix to sync to is the NTSC GOUT. The trick is, the audio for the NTSC GOUT isn’t synced very well to begin with. You could do better by first syncing to a well-synced source (4K83, which you already have done), and then trimming out the extra frames – that’s the two frames in the rebel fleet establishing shot after Luke’s last scene on Dagobah. Trim those two frames and patch over the audio so it’s smooth, and you’ll not only be NTSC GOUT-synced, but actually be better synced than the actual audio from the NTSC GOUT!