Right now, in my search for a DOHC ZC motor, I am having a hard time finding any but the grey plug OBD1 ZC's. The engine is going into an 89 CRX SI, so the yellow plug OBD0 motor is the one I would prefer. But how hard would it be if I went ahead and got to OBD1 ZC to convert my car to OBD1? Also, on a completely unrelated topic, why is the B17A such a disregarded motor, what makes a B16A better than it, if anything?