I'll draw something up in SolidWorks and see what it looks like.

I don't know what the original application is - I can only guess that it was for a 270 or 302 in a big truck. It has GMC cast into it - and the passages have nice gentle curves to them.

Not sure how to have a common waste gate while trying to run divided passages - I guess I could have an opening that goes into the divider. We will see what it looks like in CAD.