Why the hell did you get a Y8 block? You should never get into a project without proper research. There is no way to get the ECU to not notice these sensors are not working. If you continue on this path, you will ruin the cars resale value. Just swollow your pride and get a Y8 block and do the guy a favor. You can put a Y8 head on a D16Z6 but not the other way around without switching to the P28 harness and ECU.