depends if it's series one or 2 for both EB and NC fairlane. but if the are both same it's direct fit. exact same..
the only difference will be if one is series one, the other series 2 the lower control arms are wider on Series 2.
you can change the bushes to suit on one end of the lower control arms to suit.. or if your car is a series 1 and you fit a series 2 diff you can just pack out the difference with big steel washers like a tow bar has
EF has different brakes and series 2 style lower control arm bush..
AU is a wider diff with EF style brakes.. would probably still bolt in but you'd be mucking around a fair bit
