the zetec SE engine as found in the fiesta ZS and the early focus is completely different to the zetec E, naimly that the inlet and exhaust manifold are the other way round (inlet being at the front, exhaust being at the back) on the Zetec SE.

If you wish to turbo it, for simplicities sake, transplant a 1.8/2.0 Zetec E, a late Xr2i/RS1800 would be a good donor