I have a question regarding the difference in the 1954 6 clyinder valve cover and 55-57 valve covers. The valve covers appear exactly the same except the 1954 has 4 vent slots on the top which later ones do not. Now the oil fill cap I am using on the 54 is the flat type....what is the reason for the vent holes and does it relate to the down draft tube and the oil cap used?
I have a REALLY nice valve cover from a 55 than I want to use on the 54 engine but not sure if the vents are absolutely necessary.
Thanks for the clearification
