Shouldn't need to worry about the ignition system, both have external igniters, ones at the back of the head, the other is in the coils. You can get a kit from jaycar to control the vct(you may need two of them, one to swith on, one to swith off) Im pretty sure you need to swap two injector wires, as they are wired in a different order. What remap are you going to run?