With a 2.1 Zetec a fiesta loom would be rubbish. With that set up you'll want something mappable. I'd recoomend Omex 600 or Emerald ECU, you make up your own loom. Its what i'm doing with my 1.8 ZVH.

a 1600 ECU will probably run lean on this set up, do it right first time with a mappable ECU.