The B30A does not come with a PCV in the vent pipe between the camshaft case and the air filter case. Would it be advisable to add one in line, and if so, which one?
The Stock B30 as found in the C303 has a vent restriction fitting on the manifold. This is really all you need when you are running carbs. However if you really want you can use Duralast PCV1140DL. It wont hurt anything and is cheap.