Steve,

Are you referring to a 1954 original engine, valve cover, and oil filler cap (which did not breathe in 1954)?

Also, I think that the PCV set up on 1954 235/261 engines did not have a tube from the valve cover to the intake manifold. A diagram is at the bottom of this page.

[Your profile shows you have a 1954 1300 1/2 ton. Maybe a Canadian Chevrolet had a different set up?]

Tim