What all is done to the heads when you get a 3 angle valve job? How about porting (or is it the same thing)? I have a set of 66 BB heads 2.06/1.72 that I'm about to have worked on. I recently put new springs and roller tip rockers on them. Someone suggested putting larger valves in them, but I want to use the rockers and springs I just bought. Is it possible to go to larger valves and still use the what I have? I don't race the car, just shows and cruises. The heads needed worked on, so I thought I would do what I could to beef them up a little. thanks for any comments.