you may be able to, i just remember something about the oak management system but if you use the same set up as me: i used the ecu from a 2.0 mondeo along with injectors, maf, and throttle body from the same car the ecu needs to have DEEP stampted on it though thats the best one, the best inlet to use is the 130bhp one from an xr3i as it has larger ports and as i found out afterwards its best to use the fiesta rs1800 throttle body as its a pain to modifiy the 2.0 one and i believe the 2.0 and rs1800 are the same size