hi,i own a sa22 that runs with fc engine 13BT.the problem is that i bought it this way and i think that the last owner(he is a mechanic) has mixed up parts to make it work.i think the block is from s5 and the rest from s4 engine.the funny is that he uses N322 ecu,especially N322 18 881C that i think is a euro-spec NON-TURBO-ECU.he had the distributor on too.it's a mystery how it works and i have to tell you that it cicks ***.i'm going to change the coils first and after that i'm going to change the ecu.what will i need for that?engine harness?what else?thank you