It is a z24 with u67 that has been decked .the oil passage from the block to the oil pump for the L20 timing cover doesn't quite cover the hole so I put the z24 timing cover back on and put oil resistant rtv at the top we're the head meets the timing cover on the corners the gasket covered most of it. I probably didn't need to rtv it but for peace of mind I did it any way. The lower coolant outlet I think came off a 280z.