226 G straight 6 overheating

[edhd58]

My 226 g is having an overheat issue. It happens when setting still and idling. Cools back down when moving, and engine speed is up. Took it out for a drive today, 90 degree day, all was fine when moving but as soon as I let it idle the temp would start rising. I hadn't had it out enough till now to notice this problem.

What i have is,

Recent rebuild, less that 250 miles, machine shop didn't acid dip the block they baked it.
New rebuilt water pump, with new style helical fins, not the straight original type Ford pump
NORS radiator - new not rebuilt -- 0 lb cap
Belts are tight - do not squeal if engine is revved hard


If I put a fan in front of the car, idling it will cool down.

Any suggestions?

In the pics it has cooled back down, it had reached 210 on the mechanical gauge, the dash gauge is not hooked up