I recently abandoned the PCV system on my '62 261. It caused an erratic idle speed at all times and did not get along well with the large vacuum leak as the engine evacuated the vacuum tank for the hydrovac brakes, etc. I couldn't get the idle speed below 900 RPM and then it would surge especially when hot. I had carefully dismantled and cleaned the valve according to the 1962 drawings.
Aside from that there was evidence of oil being sucked into the manifold from it. We'll see if oil consumption drops with the re-installation of the road draft tube. I looked for a new valve but couldn't find one by the part number stamped on the valve. Perhaps the superceded number would work but I'll see how the road-draft tube works out before I go hunting.
