Has anyone done this before and if so how exactly did you go about doing it ?

The car is a Sierra GL with a 24v Cosworth engine, it runs the full 5 stud Granada setup on the back but the front is still 4 stud as apparently the Granada stuff isn't a straight swap over.

I have heard some hubs off a xr4x4 are needed but not sure if that is correcr or not so wouldn't mind knowing for sure before trying to source any parts for the job.

Any advice would be appreciated