I converted mine from a 2.0i DOHC. I still use the DOHC fuelpump and also the DOHC crossmember and engine mounts with the engine arms that belong to the BOA.

You have to use a V6 flywheel, you can't use a YB flywheel. I'd say the best option would be to use a 2.8 or 2.9 flywheel with a 2.9 clutch kit and a MT75 V6 box.

The prop depends on the gearbox. The standard diff can be still be used as all mountings for the prop are the same anyway.