Crank case venting is important for any "high hp" car. Sending an oily mixture back into your combustion chamber is in no way a good idea. The CCV setup on a NA LS motor is as simple as it gets. Using a vented catch can on an NA motor makes zero sense to me. You have a constant vacuum, use it to your advantage. Pick a decent brand non vented catch can and mark it off your list of mods to the car.