"Charlie" has Overheating probs- Here are my Clues and please chime in with opinions!

Trying not to put a Band-Aid on it, if I can- but that may well be the direction I may have to go. Just hate having to do that if not necessary- and putting the car down for an indeterminate time while I tear it down and have it hot tanked. Not to mention the money I have set aside for the other project getting sucked into this one. . .

Don't ya just Love the discovery of former owner ignorance and neglect? Makes me want to drop the slant through his roof :-)
Sorry! I didn't mean to come across like a smart-a$$, Believe me I understand your frustration.