In case you hadn't realized yet, Cobra Tim there is one of my two brothers who own this ITS car
Thanks for the advice. The other brother (Chris is his name, and I am Shawn, for the record.) has since explained to me that this "slight rough spot" was felt with the head off of the engine, and he has read these responses and decided that on this particular head, his concern was a red herring. We DO have plenty of heads from which to pull towers, so if we need to replace them come assembly time, we will.