It will definately not be a straigth swap as the rack is totally different. Rod ends are of different size, the rack is longer from joint to joint, the mounting is diffrerent, and the splines are of diffeent standard for the steering column.
I have my conversion now finished and it's working nicely. Mondeo 2.0 Zetec turbo engine with mk6 zetec Escort PAS pump and reservoir joined with a 1987 US-Escort rack.