Here's an update. Replaced thermostat and seal, burped coolant, and it seems to work for a lot longer than it used to, but still overheats. While driving around town, stop and go, it stays at or above 175, then creeps to just above, then higher a few minutes later, but holds for a longer time, each time it creeps higher. Hasn't redlined as of yet, and have been taking her out for longer and longer drives, but she creeps up to the next line after 175 and when I get paranoid enough and start heading home, she is above that mark, so by the time I turn her off I am sure she is heading that way. Have gotten her up to about 75 mph on several occasions, and she sings right along, but gets slowly hotter. All of this is with the heater full blast. Also did the radiator flush before replacing thermostat.

Questions or direction?