You don’t need to remove the fan clutch. The shroud I believe so yes. It’s held in by clips. I think your best bet is to do it from underneath the car. You don’t have to do it overhead the engine. Try doing it underneath sitting on the ground before you take it apart. Been a bit since I rotated a 606. I’ll crawl underneath mine and let you know if I have time tomorrow.

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Only diesels in this driveway.
2005 E320 CDI 243k Black/Black
2008 Chevy 3500HD Duramax 340k
2004 Chevy 2500HD Duramax 220k