I would have made this a fest, but the voting preference was overwhelmingly in support of an exchange in the poll, so an exchange it was.
What I could do (and what a number of mods of exchanges do) is - after the reveals happen - I could replace the text in the entry containing your story with a link to your journal instead. That way, you don't lose your comments, but you are the one with control over what happens to your story thereafter (after the initial anonymous posting period).