I believe your right because it is a round carrier. but not the type that were used to seeing on an LT, It would be sweet to get the whole rear end fabbed up to work on an LT though. I dont think I have ever seen a YFZ with a broken swingarm, or any other issues like that.
It might be worth while hoping on a YFZ forum and see if there are any "normal" issues like that with certain years to avoid. I've always thought that the stock YFZ suspension set up was one of the better ones to get off the show room floor, until the LTR came out at least.