I've noticed recently that "news" seems to subsist completely on copy-pasting tweets and online posts. Does nobody find it odd that this guy wrote an entire article based on a nastyz thread? I'm assuming he asked permission of all users involved?
Something all original, numbers matching and pristine as that car, I'd say leave it as-is. If one already has had an engine and/or transmission swap in it's life, it's fair game. I actually like resto-mods when they're done with some class and aren't overkill.
Not exactly a "survivor." In the article it states the quarter panel, and the trans have been replaced. Two big ticket items that take away from the survivor aspect. It is no longer 100% original paint, and that the drivetrain has a different transmission, definitely not a survivor. Modifications won't hurt it.