Thanks for the reply, Jerry. I copied a portion of your response here 'cause I've got a question...
Fresh air was introduced into the engine by installing a 90 degree elbow over a hole drilled in the valve cover with sheet metal screws, and another nipple that was attached to the "clean" side of the air filter by cutting a hole under the nipple and attaching it with sheet metal screws. A piece of 5/8" heater hose connected the two nipples. If the engine had a vented oil filler cap, it was replaced with a sealed type. Any other vents, such as slots in the valve cover, had to be brazed or welded shut.
According to Deve's method, if I remember correctly, fresh air enters the system through the vented filler cap or valve cover. The method you've described is more involved. What do you think about just allowing fresh air to enter the system through a vented oil cap? That's the way I was planning to do my setup.
