I've rebuilt a 5 bearing diesel and want to take out the perkins 4203. ?
what am i likely to have to do to get it back to original re engine mounts clutch etc? also does the 5 bearing fit the s3 bellhousing without probs.
hope you can help not much info out their
cheers

It will fit the bell housing assuming the bell housing was not changed to suit the Perkins. No idea on the other questions.

I would find a thread about fitting the Perkins, and work backwards to see what was changed.

Like this....
http://www.landyzone.co.uk/lz/f6/montego-engine-series-2a-35401.html

Seems like bell housing and clutch could be issue.