Thanks guys, it seems to be taking forever to get anywhere with this project.
Well I got a chance to do some work on the back finally so I started by building the lower links by using the ends from the stock links as they have nice flexy rubber bushings in them then sleeving them with some 1.625 dom with .1875 wall, should be solid enough.
I then put together a center mount on the diff out of .250 plate and glued it on