Hi, as far as your mods no ecu runing will be needed, as the ecu will compensate for the increased air. however a remap such as bluefin could give you some more power.
I'm building a Mk1 Focus 1.6 zetec s with ph3 newman cams, ecumaster piggyback ecu, gsxr 600 itb's and full exhaust. Car currently has ph2 newman cams, full exhaust and bluefin remap runs great. There arw options out there for the 1.6 but just expensive for little hp compared tp bigger engines.