[Mike Taylor 3601]

As I understand that is correct,can unshroud to head gasket bore,changing 30 to 45 or ? I think is allowed but have'nt checked,to verify that so I would check on valve angle. To decrease runner CC mill intake/ex surface.
I leave filler 1/8-3/16'' ish down in heat riser passage on bowl side,so it's filled but does'nt protrude into bowl area,and fill all the way to intake surface.
I have another 200 BOP if interested Ron.
Mike Taylor 3601