if your wanting to use the mondeo ECU then the loom has to be changed mate,
if your gonna get an aftermarket ECU an get it mapped, then buy the one for
the 1800 GTi.. the aftermarket ECU option is the best

unichip or something wil be fiiine for that,, Fudgeass on here ran one for
ages was 166 bhp after Unichip,, very few other mods.