Valve cover question???????

[1986Silverado]

I am thinking of buying some valve covers from a board member, and have a question or 2 about them. They are tall valve covers and was wondering what to bolt them down with? Also they have one hole in each side and my stock ones have both oil fill and pcv valve hole in passenger side, can oil be added to driver side or should I just move the pcv valve over to the driver side. Or will I even need the pcv valve with a breather cap? Thanks