Saw these valve covers in the classifieds, they really look nice but I wondering if they have no access for PCV or breather, how do you get around that for a street driven motor? Doesn't look like a set I'd want to core a hole into.

 

You can add the PCV valve by drilling a hole into the intake valley. A breather cap can be added to the oil fill tube.

 

Whether the valve cover or intake, the pcv should be baffled to prevent exposure to splash oil.

 

Agreed. The is why I like the factory angled grommet vs the straight open style.

 

I do not have personal experience with that valve cover but most cast aluminum valve covers have a "knock-out" where you can put a breather in and I would guess that the knock-out on that cover is at either end, the round area where the "rocket" emblem shows.