I'm not sure where this sudden promotion of the open chamber head is coming from. Yes, I am a Cleveland enthusiast - let's try not to make this personal and stick to discussing the engine.
Could you compare and contrast the closed chamber and open chamber 351C builds you are currently running, George?
Regarding "it's not a wedge" - to me it sure looks like a wedge. Edit: the yellow document you attached to your first post has the word "wedge" in it. I understand that a few degrees of cant in the valves improves flow and allows larger valves to be fitted, but I still see the closed chamber as being roughly a wedge. It's a lot closer to a wedge than a hemi is, and that's a good thing. You can call it what you want, but the difference between the Cleveland chamber and a wedge chamber as it pertains to combustion cannot be large in my opinion. That is the advantage as I see it to the Cleveland head, better flow than an inline head, but better combustion/compression ratio than a hemi style head.