hahaha you a funny guy Eddie. Easy question and once again the info on club4ag is crap.
From my cooling guide right near the end:
"There is some false information being circulated that because the re-routed cooling system design is like that of a 16V engine then a 16V gasket should be used, this is completely false. Because the flow direction is only changed on a portion of the 20V head the flow from the block to the head remains the same; that is from the front of the block to the back of the head. This is unlike the 16V where the water goes into the front of the block and out the front of the head. So therefore by using a 16V gasket on a 20V head the rear cylinders will be run cooler than the front."
That said there is a way to convert a 20V to a true 16V water path where it uses a 16V gasket. I machined up some parts for it, lets just say a welsh plug has to be knocked out of the front of the head for a new water outlet for it to work.