Didn't the formula ford cars run 1.6 zetecs? I'm sure I saw on 5th gear once they had a challange where they swapped a 1.6 zetec from a focus or something into a formula ford in a compertition against some colleges (probably a clip on youtube somewhere), thay had to change some of the components to formula ford spec, I think they changed the inlet, ECU, and the sump to a dry sump, maybe yopu could try and track down some of the parts and fit them to yours if you want to keep the standard lump in