Seems a few people have ran into Node server time outs when running larger Ghost imports from WordPress. I have a high profile client that needs this migration completed soon and am happy to pair with some folks who know code to get this fixed, as it’s not getting much attention from the Ghost team.
Here is the detailed issue report I filed: 502 Gateway error running ghost import CLI tool · Issue #1500 · TryGhost/Ghost-CLI · GitHub
Please reach out if you’d like to work with me to fix it, or know of the right SQL queries to run to write a quick script or do it manually.