Long story behind my problems of my car. Water got into the lower intake plenum and when I drained my oil, lots of water came out as well. My mechanic is coming over a second time to be sure if my engine is wacked or not. But was just wondering what are the advantages of putting in a skyline engine in my Z. Im thinking of doing that. Which models should I be looking for. I can get one and custom fit one with no problems, just wondering which engine model I should be looking at. Which was the one that puts out 398HP?