In addition to what @nhinkle said...
There's a very simple rule for situations like this
Never migrate crap
Assuming we're a open migration path and someone migrates crap, we'll likely reject it and kick it back - we're not anyone's dustbin. If you think its potentially a good question, with a tool you're going to use, why not simply ask a new, high quality question? It would be much more useful that way. If you really want to migrate it, fixing up the question and answers would be another option pre migration. Give us something we'd feel comfortable with having on the site before sending it over.
I'd add that SF had requested that they be removed as an automatic option from SO cause of too much crap coming their way, so migrating crap would probably have consequences for the source site. If nothing else, folks who're regular here will be rejecting a lot more migrations.
Practically speaking though, you could take the route SF, SU and a few other sites go, and check with a mod on software recommendations.