I ran mine on the original EEC-IV fiesta ecu for a while, got hold of a mondy one, but couldn't tell the difference, passed mot's with both ecu's in....
That said, it could have ran more power as i was using the 1.6 inlet, and a 15.5 at pod showed that.
But to answer the question, it basically bolts straight in.
Good luck, you'll love it.