63 Dart overheating issue

Haven't had any dirt in the coolant or discoloration since the initial startup and flush. I am guessing that is when it got blocked. Everything that comes out now is nice and green. I am thinking once this problem is finally resolved I should be good.

Oh, and one thing I forgot to mention. I checked the vacuum at the carb. Basically none at idle but gets stronger as rpms increase. Don't have a vacuum guage so i can't tell you exact measurements. Also again I checked mechanical advance with the vacuum disconnected and as you increase the RPMs the timing changes as well so I'm confident that is all correct as well.