I think you will find it will work better with the breather added. Also, and I know......it's gettin nitpicky, but if you add the hose to the r cleaner as in the diagram, you will greatly reduce oil residue on the valve covers. I have mine just like the diagram on Vixen's slant 6 and it works good. I know some argue PCV is emissions and that's true, but a properly operating PCV system also helps the rings to seal better, so what's not to love? lol
