From what I am hearing, it basically requires an overhaul and then you get the 7000 TBO / 3500 Hot Section (dash 10 only). I don't know if it makes the overhaul more expensive than it otherwise would be, or if anyone who gets a dash 10 overhauled these days comes out with a 7000 hour engine, and I can't seem to get a straight answer so far.
However, the ones to ask are one of the big overhaul shops. If I find out, I will post the answer here.