273 intake manifold, and valve cover questions

I need to replace the intake manifold gasgets on my 65 Valiant 273 2bbl and would like recommendations on which is the best gasget set, and what type of gasget cement is best for this application? I will also be replacing the stock valve covers with a set of chrome covers that I picked up at the spring fling. My question on the valve covers. The stock covers had a pcv valve on the right cover and a breather on the left cover with a hose to the air cleaner. I picked up a grommet, and pcv valve for the right cover and an oil fill plug for the left cover. My question is do I need to replace the oil fill plug with some type of breather or is the pcv valve enough? Thanks in advance. Litz