Dave, in my truck it is a viscus oil clutch, not an electric. Believe me it drags all the time. with your truck you can put your hand in there when it is cold. Mine would probably slice up a ham nicely.
I'm going electric because of this. If I had your fan (and ECM, and engine) I would not change a thing. I think you are barking up the wrong tree here.
an active grill block and a way to monitor the fan would be my choice. Close off some grille but don't change the way the fan cycles.
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2007 Dodge Ram 3500 SRW 4x4 with 6MT
2003 TDI Beetle
2002 TDI Beetle
currently parked - 1996 Dodge 2500 Cummins Turbodiesel
Custom cab, auto, 3.55 gears