I had one in my Murc replica and I used the factory wiring harness and sensors and it ran. I just took my time with the labeling the wiring before I removed the motor out of the car. I would unplug the harness and take voltage readings and then try to start it, if it didn't start, I knew it was important! I did have a harness that I bought from Adrian but I never used it. I sold it with my car. Someone used to make them.
I'm using the factory harness and ECU now in my Audi build and it runs great. Unless you are boosting it, the factory settings should work for you. It's N/A anyway.