Since the beginning you have taken my comment out of context.
You were talking about gasket matching "BY ITSELF" and nothing else. My statement was about it "by itself" and I most definitely stick by it because my statement is true. Common sense true to put it in your wording.
Now you come to the defense of it again by stating examples of full porting jobs of the heads and manifolds and stating the using of the gasket as a template can show gains. That is most definitely NOT gasket matching BY ITSELF now is it. It's also not a given on every engine. (but everyone does it and recommends it you claim???)
However it is not a "definite" proposition for the reasons I gave in my last post. You remember, the ones you just stated were "common sense" yet you argued against in your first response to me.
(which is it by the way???)
Then you chime in with "Rough castings often restrict flow, and cause excessive amounts of pressure and resistance." That's like the "well duh" of statements. I even referred to it using the stock vs SVT statement. The SVT UIM uses the Extrude Hone process which does exactly what you just explained to me.
(SVT heads as well for that matter)
However. You seem to state it like in order to "remove the rough castings" you have to hog out the ports. That is not true at all. You can smooth out the ports and only take a small amount of material out. You do not have to open them up to match larger gaskets. You do not have to oversize them and lose velocity.
Which brings up velocity & cylinder filling. Those are far more important then changing to port size to just match a gasket. Like I stated before there are more important factors then maximum flow ability. Runner length, port volume, port velocity, swirl effect, cylinder filling ability, et cetera. I'm not saying maximum cfm ability is not important but exceeding the needs of the engine is gaining you nothing and almost always hurts other areas.
I will end with the following.
Why tell someone to do something you have no idea how to work on. Your advice was completely incorrect on this subject. Your using general knowledge and stating it will work because "Every serious engine builder IN HISTORY does " still does NOT make it correct.
My first response was against using gasket matching on our platform and just blindly using gasket matching by itself on any engine. Both statements are very correct and I stand behind them.
For what I have seen in your posts. You may have some good books and obviously have some good experience but by arguing for just one small part you don't seem to fully understand the whole picture of why things work the way they do. Take that however you want as it's just my opinion. I have plenty of them. When it comes to automotive related knowledge I believe my way of thinking shows well for itself in the cars I have built. Other opinions may not. They're not my opinions.
very sad. 
