Getting ready to start on the 460. Have it apart and several have said to remove the smog constrictors on the exhaust ports.
It is a 76 model.
My question is: are you talking about the little risers that are near the valve stem when looking into the exhaust port? I have noticed that these have a little hole in the center of them.
How far do I go? Do I completely grind them down smooth, or do I need to leave some due to the thickness of the head?
I know its a dumb question, but I had rather be sure before I ruined the heads.