The original option of PCV was on the modified downdraft tube. Later it was located on the valve cover. Since the fumes of concern, namely water vapor, will rise once the engine oil warms up, the valve cover, being the highest point of the engine, would be the logical place to put the PCV valve. Would a non-vented 235 valve cover with a hole drilled in it for the PCV valve and a baffle under it provide the best option for evacuating water vapor?
