Gettin My Feet Wet - 383

This is something that has been in the Mopar Performance books over the years. You see the head gaskets have a relief area where the notches go. It is just a crescent shaped bevel that evens the combustion chamber up with the bore to eliminate turbulence and improve flow. My machinist has been doing it for decades and says you can see the difference on the dyno. I don't know how much the gain is but it is worth doing while you are there...