451 overheating, even when moving

Here's the test results after 20 mins of idling and fans on

Lower hose next to the rad 195

Upper hose next to the thermostat 205

Thermostat housing 212

Coolant in the top of the rad 198

Any air has to be purged by now, time to try a different fan, unless the previous owner was running race coolant, we test drove for nearly an hour before I bought it and there was no indication that overheating would be an issue.

Amazon has the mechanical fan in stock, and it can be here tomorrow...

The headers were all pretty much around 950 to 1000