[Lady72nRob71]

Adding the shroud should fix it as has been mentioned twice.

Although the fan clutch may be somewhat stiff when the engine is cold, it may not be thermally engaging (providing it is a thermal type with the coil on the front of it).
The old fan clutch in my 72 was like this - engine at 212 degrees but very little air flow from the fan at idle. Replaced the clutch with one from the Part Place and now after a good drive, it is blowing a LOT of air (enough to be blowing any loose papers out of the garage...) It sounds like a small helicopter as well.