It's all good with the distributor. I'll get what I need.The EG Si in Australia used the OBD1 DOHC ZC with that distributor. That's where i got mine from. Also the JDM EG received a DOHC ZC also. You've just got to be careful, because some markets had EG Si's that were SOHC.
You can still use your OBD0 harness (which i think is the right way to go - because your injectors will still be OBD0 and you need the resistor box to still be wired in), but you will need an OBD0-OBD1 distributor wiring adapter if you're not comfortable modifying the wiring yourself.
Jlicrx has already mentioned the things you'll notice are different if you use your OBD-0 harness. For those bits you'll either need to swap the sensor/part or the plug on the harness to suit.
If you've already got the OBD-0 harness, use that.
OBD-2 injectors would be easily usable. I would need to get rid of resistor box, which is easy.
Going with OBD-0 engine harness seems a little complicated...but OK. If I get any kind of information on converting everything to OBD-1- I'll do it. I'm blank page of paper now 😂 Just don't want to miss anything while planning my swap step by step.
Swapping plugs on the harness would be the most understandable way for me. Of course, I'd need wiring information where most of you going to tell me to use manuals. Most of the times sensor's plug has uneven number of wires compared to each over (especially compared OBD-0 and OBD-2) and everything seems undoable, that's why I want help.