My intent was not to be at odds with anyone, rather perhaps to add to the discussion in the sense that there are "some" differences in the inlet ports, yes perhaps only mildly, but still "some" differences; as you apparently also understand as you presented your observation of the difference in the short-turn of the two examples you mentioned.
As far as being "helpful", beyond the demeanor you seem to be putting forth, I'm not sure that many care anymore of these old cast iron examples for the S.B.F. as today one can just order a new aluminum cylinder head that will out-flow anything anyone could create out of the O.E.M. cast iron stuff, weight fifty (+/-) pounds less and spend less money doing it!
But yes, there are exceptions where this stuff is (still) desired, and in these instances, if you really want the "good" O.E.M. cast iron head example, if there are rules and its' legal, and you can find a (good) set, it's the "C6FE" casting; which presents what I would label as "quite" different inlet and discharge porting, and based on my flow-bench seems to be the better example!
Scott.
