Well, I did 2 things. First, somebody had K & N breather filters on the valve covers. They came off and hit the trash and some chrome breathers were installed. That helped quite a bit. Next, I drilled the valve cover for the PCV valve. That took care of everything else. No
oil puking out from the filters, and no
oil smell from the blow-by. I did have to richen it up a bit as Bob stated. As for the drop in vacuum, I see nothing.