No need to change the sump on the ST170 as its already the right way.

You need to spin the water pump the opposite way though. There are brackets available from area6 that do this off the shelf.

The flywheel can be 1.6/1.8 zetec or a efi CVH if you have one. If fitting CVH the mounting holes need drilling to 11mm which is 0.5mm bigger than normal.

The engine mount needs sorting just the same as any zetec but thats not a problem.

HTH

Mart