Thanks guys, I think what I'm trying to get here is a way to prove he didn't do what he said he did, Cos I believe he didn't change the box over at all. When I asked him where he got the box he wouldn't mention names of wreckers or anything so it's all a bit suss.
So if he did change the bos would he have to have a different TCU for it to work or can the one that belongs to the car run it with a flash tune?