capri boss's are the same as Mk2 transit.
Mk2 transit boss is the same as Mk3 but doesn't have the blank splined area that the Mk3 collum has (you can either just put a Mk2 transit one on and tighten it up to make the space or file the missing groove into the collum
Mk3/45 cortina and Mk2 escort don't fit
so you need a capri boss and the fitting/adapting is up to you
