norcalrallyist

I was told its a Ver 1 sti clip and other people have told me its just a wrx. Its definately a early something because it doesnt have the coil on top like the later engines and its an ej20. So if someone could give me some pointers on how to tell the difference so that I can get hte correct wiring diagram and ecu pinout that would be great. My ECU is labeled 2C, is this the model number? Can someone help me make sure I have the correct pinout and diagrams please? Help much appreciated!

Thanks
Garrett