from what i understand the mtx75 is the same as the mt75 box, just turned sideways so you could go along the route of the cosworth clutch kit depending on the original stuff that's fitted
they used a bigger clutch than the normal set up, 241mm as opposed to the 220mm versions but they still used the same size bellhousings

unless they've changed them on the mondeo application, in which case the st version would do the trick