Hi guys I have just got a 1.6 aee which I will be putting into my mk2 I was wondering how you go about the wiring I have the complete loom and ecu from the old car

You have to take it all apart and remove things that you already have on your car loom, so things like lights horn etc and then lay it over your current one and join them together. You should only have a few wires left over in the firebox area as the majority will be for lighting etc I don't think you will need the 6n fuse box.