I am going a different route. Much cheaper. I am using a differential with stamped steel housings. There are two good ones to use. The Toyota 8.25" and the Ford 9". Both have removable third members and with a centering devise, which I have for the Toyota, you can cut the housing and reweld it for an off set if you desire. Full float kits are available for it and custom axles are relatively inexpensive at 161 apiece.