I wouldn't get a new set of valve covers just because of that.
A lot of guys like having two holes on one valve cover so you can have the PCV valve in the rear hole and use the front as the oil filler hole. Just plug it with an oil filler cap. Just make sure the hole with the PCV valve has a baffle. It doesn't matter if the oil filler hole does (and it's nicer not to have one there when you pour the oil in). It makes it easier and faster to pour the oil in than removing the other breather and pouring it through the baffle on the other valve cover.
You don't ever want to run a breather on the same valve cover as the PCV valve though. It will reduce the effectiveness of the crankcase ventilation system.
A lot of guys like having two holes on one valve cover so you can have the PCV valve in the rear hole and use the front as the oil filler hole. Just plug it with an oil filler cap. Just make sure the hole with the PCV valve has a baffle. It doesn't matter if the oil filler hole does (and it's nicer not to have one there when you pour the oil in). It makes it easier and faster to pour the oil in than removing the other breather and pouring it through the baffle on the other valve cover.
You don't ever want to run a breather on the same valve cover as the PCV valve though. It will reduce the effectiveness of the crankcase ventilation system.
