Well I've not done it but I can imagine it is quite a big task, for one you need the ECU to go with the engine, then most probably the wiring loom or at least some additional wiring, faced with that alone I personally would sell the 1.6 and find a 1.8 F or TF , just my thoughts I sure others will disagree but you need all the facts before making the decision, there's nothing worse than starting a major task then hitting a huge unseen hurdle. Good luck and I hope you get all the information needed.I.m thinking of changing my 1.6 for a 1.8 what would be the best option 1 know the vvcis the highest output will i need all the ancillarys or can some be salvaged from my 1.6