I just cut off the downdraft tube and inserted a common grommet (bought it at Auto Zone or O'Reilly's). At the top of the copper tube I inserted into that I used a 1/2 to 3/4" plumbing adapter and into that inserted the PCV valve. Then I bought a generic non-vented oil filler cap with a grommet and used a 1/2" copper plumbing outlet into which I inserted rubber hose which goes to a nipple under the air cleaner (for the clean air source).
~ Jon 1952 1/2 ton with 1959 235 | T5 with 3.07 rear end
