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

After you seen the black "gunk" in the cooling system, you should have done the right thing and rebuild it. Stop putting a band-ade on it.

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 :-)