Wiring . . I have just put a 89 2mg engine into a 86 1fn frame. The 1fn has 2 pick ups and the 2mg only has a single pickup. The ign boxes are different, but the looms are pretty much the same with the exception that the large wiring connector to the ignition box uses the same colour wires but in different positions. I bought a 2mg ign box and altered the position of the wires from the1fn loom in the large connector block to suit the 2mg box. Fired it up today and all is good. Everything works as it should. I’m no professor at this but spent many hours trying to suss it and it works. I have some wiring diagrams here if you get stuck. My 86 1fn engine used ign TDI 14-39 1AE-10 My 89 2MG engine used ign TDI 14-56 2MG-10 Hope this may be of some help to you.