> Otis, I think you have it. This is EXACTLY what I > hear. Today, I pulled the valve cover and could NOT > find the problem so pretty much isolated it to the > manifold. Now if I can only pull it without pulling > the engine.... Ain't much room in a 73, especially on > the left side. The good news is that I think I have a > spare. You can did it with a little wiggling... Been there done that (twice)! Steve