Yes the sump would be part of the problem. I believe the rack fits infront of the crossmember on the Capri, where as my steering gear is behind the rack. Thus if i put the rack where it will actually connect with the control arms ( behind the crossmember ) the steering will turn the wrong way ( right turn on the wheel will give a left turn at the front wheels..) The rack would have to be flipped around end for end, which would then be wrong for a LHD car. I could use a RHD rack and flip it, but the angle on the steering shaft would be a bit off ( I guess a universal joint would accept a bit of offset..)
My friend has done the rack conversion on his 105E, and wound up putting in a custom crossmember and because he is using a Zetec, the pan is ok. I think he used a VW rack, but i'm not sure. He sure spent a lot of time on it!
Still, the stock box is just fine ( except when they explode or whatever like mine did..) /ubbthreads/images/graemlins/hammer.gif