That's good. But I don't have a 318 in my Dart. So building that head for me would be a waste of time. I'm torn between a 302 318 head or stock 66 273 head.
An FYI about 302 heads and stock factory exhaust manifold on drivers side; the manifold will not lay flat due to shape of head and manifold where it; the manifold; drops down. You can check this when you have the head and manifold on the bench before you install the head. You can grind the bump down for clearance just don't go nuts, you can strike water and then it's game over.