Not Ranked
I don't see the rib you are referring to in these photo's.. I do see the rib.. but not the machining groove. How did you ID the heads.. I am given a part # of C4AE-6090C.. as far as port sizes the 390 hi po motors and the 427 low rise motors were the same.. I don't doubt your guru-ness Mike but how did you come to that conclusion?
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michael
A man that is young in years, may be old in hours, if he have lost no time. But that happeneth rarely. Generally, youth is like the first cogitations, not so wise as the second. For there is a youth in thoughts, as well as in ages... Sir Francis Bacon (1561-1626)
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