Hi All. Just had a Vargas CNC non-cast Valve cover installed. 25k on new crate engine. Single Mishi catch can on the cold side. engine never smoked before. RB drain lines, nothing else done, and it smokes at idle, catch can is clean. After driving for a few minutes no smoke at idle. Let the car cool down and start it, smoke is back. Again no smoke before the VC change. I know the new VC does not have the internal parts/design that the stock one does. How can I get it to stop smoking? I believe I need more vacuum. But then again I am a noob so...