Not building heat

Dana67Dart said

1. Did the heater work properly before that change?
2. Does the heater work properly after the change?
3. Did you get all the air out of the system?
4. When the engine is cold and running, if you take off the rad cap is water circulating in the rad?

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Heat worked great before new radiator.
Gets warm, not as warm as before.
No air in system and I can see coolant flowing through the radiator.
I had to change it since the original had sprung more leaks than the Titanic.
This is why I think the fan clutch is hanging up and not spinning freely at 55mph.