excessive 340 crankcase pressure

Following this because I have been through it. Picture the engine sealed to atmosphere. Then picture adding a filtered fresh air inlet on the left valve cover. Then Picture adding a device that enables you to pull a vacuum on the engine crankcase (PCV valve) on the right valve cover. Then picture plumbing the PVC valve into the vacuum port at the base at the front of the carburetor designed for the purpose. In order to work correctly the engine has to be able to breathe and you must be able to pull a vacuum on the crankcase. Without that you will have uncontrollable emissions coming from every open to atmosphere place on the engine regardless of ring condition or otherwise. Under hard acceleration all engines pressurize the crankcase. (specially built race engines excepted "yellow rose")