I am designing a hydraulic manifold.  I have to add add 3 different ports all over an aluminum block for some valves.  How can I create the ports as a library feature where I can drop them into the model and then define an X, Y & Z dimension to a certain point on the port to locate it?  I made blocks up for the revolve of each port shape.  I have attached one of the blocks.  Any help would be greatly appreciated!!

Chris