Didn't want to take the other thread too much further in this direction.
Warp Speed made a comment/observation about a picture of D3 heads Paul(Lakes Only) put up.
You can still see the imprint from the fire ring in the head gasket to give a general idea of the quench pad area. The chamber is completely open on the lower half. I believe, and Paul can correct me if i'm wrong(I know he will) that these were modeled after a D0VE head combustion chamber. So essentially the chamber design is 40+ years old.
What can be improved here. I'm not worried about removing material I have compression to spare.
Also does the answer to this question change if i told you the pistons have a D shaped Dish, it appears that the quench area on the piston mates up pretty well with the quench on the head as it is.