Well, my brother and I am looking at SCCA racing. I know some classes you can do engine swaps, but it has to be from the same family. So we have been looking into right now. I know that they consider 240z, 260z, and 280z part of the same class. 280zx are in a different class. I believe that is because 280zx 81-83 were trubo. The guy who had the car before me use it to race. He put a cage in it and lowered it. He told me the engie was stock and is was putting 20-50 oil in it. Which to me was pretty thick. I can only drive the car in warm weather. Its has to be adlest 50 out or it will have trouble with it while driven. I am parting out my other 240z. I was just thinking since I was going to try to race it, it would be good to have another block.