LA to magnum valve covers

I finally got some valve covers but, decided on the Mopar performance ones. I got them in today and I am looking for some tips on punching out the PCV hole and oil breather holes?

I have a set of Greenlee hole punches I use. If you can find a set of them they work fantastic. You could also use a hole saw of the appropriate size if you are careful not to let it skip and mess up the surface.