you modify theinner chassis legs to make room for the pulleys, gearbox stays in original position, you then make custom engine mounts so the engine sits in straight and the correct angle
once the engine and box are in then you will need to sort the heat proofing out for where the turbo is going to sit, custom exhausts, boost pipes, water pipes, intercooler and rads
it will be easier to bolt a zetec turbo straight in and will cost half of what fitting a cossue engine is going to be