I converted my '58 4400 by modifying the Road Draft tube. I removed the tube, cut off the down tube and welded the hole closed. I then welded the down tube back on just for the look. I remove the top cap and fashioned a baffel to help with oil control on the engine side. I cut a hole in the cap large enough to accommodate a Valve Cover gromet. Refit the cap and installed a PCV valve. The rest was just bending up tubing and installing a fitting in the intake manifold.
This was a year and a half ago, so far no noticeable oil consumption.
Which PCV valve did you use? I have a similar set up with the draft tube, and the used the PCV I had laying around (Standard V100 threaded), and the setup causes a loud hissing, and my wipers are useless now. I am down sizing the valve and checking for leaks, wanted to know what valve works.
