My Dart Pro2 380's were just delivered yesterday. They are CNC'd in both sets of ports. The ports are massive! I am going to bolt them on a Dart Big M 598 and see what they do. Thanks for the heads up on the oil slopping into the vac pump, Shawn. I am going to install a vac pump, so I will put a baffle under the vacuum intake in the valve cover. I will let everyone know if I have any issues with them.