I was just wondering if anyone has tried putting an Au wagon diff and Au front end(springs, struts, arms etc.) into an el wagon to change the offset to Au+? Or if anyone knows how hard and what needs to be done?

The diff is pretty much just a bolt in. the front end is a bit more work.
http://www.fordmods.com/the-garage-f53/toxic-wagon-mkii-t89250.html