Which fan clutch should I use ?

George Jets said
Here is what Rock Auto shows for a 1979 D100 318 fan clutch.
About 25.00 bucks plus ship.

Want to make sure your used fan clutches are not wore out.

View attachment 1715920719[/QUOTE

yeah. I’ll just get a new one. Is my guess correct the the larger is the louder but heavy duty one?