What do you mean by 'normal' MTX75? There are several different versions, even in the same MY.

I have had no clearance problems on any hydraulic MTX75 box with cable operation, originally used on 'blacktop' Mondeo or Focus (different casings). The earlier versions of these still use the 'rod' change castings, though they are machined for and use cable gear operation.

What part of the casing is fouled on your 'normal' box, differential, release cylinder....? I went through problems like this in fitting a Calibra Turbo clutch into a MT285, but managed it in the end. I also heard PE ended up with a puddle of gear oil with a standard Ford ST170 clutch and MT285. Never confirmed, but I suspect a pre 7/2003 box and post 7/2003 flywheel/clutch. Little difference make big problems.

Martin