This cylinder head was also warped in the same manner. This could lead to greater engine damage. If you compare the above intake and exhaust CFM flow rates with that of cylinder head D there is in fact an all round improvement. If you compare the above exhaust CFM flow rates with that of cylinder head C you can see that the flow rates are very much the same. There is definitely improvements to made on the aluminum cylinder head intake flow.
Priority is in reducing the sharp right angle transition area as mentioned previously.
I am sure this could be done without to much machining. Obviously, the greater the overbore size the greater the overhang. This could result in the gasket bore periphery raised edge not sealing as was the intended design. Using this gasket with cylinder heads C or D will definitely create a more serious problem. The gasket overhang, well into the combustion chamber area, almost ensures that almost all of the raised sealing edge is exposed to the combustion process.