Hey I'm over my specs (gvwr) and didn't dog the OP...I don't have much room to speak. Most would be in a drw setup with my posted weight. I'm not ashamed! It is what it is. I have spent some time around differential's and have seen some carnage from abuse and overload situations of equipment and I personally know one poster here who has more experience than I do.
I listened to the advice given and made my choice. Now...would I do do this with half ton truck or heavy half (still semi floater axle)? No.
It seems the OP has made a choice. I wish him the best...