After I put that fan clutch on my car runs much better. I think my other one was out of balance like somebody said on here. Super smooth rotation. Well worth it just the sound of power is cool. Just an update for the future person that has a thirty year old one.
I’ve said it a few times in “vibration” threads. I remember finding a a few small ball bearings in my driveway, and never knew what they were from. A few weeks later is when I realized it was from the fan clutch! Couldn’t believe that caused so much vibration!! Thought it was the tranny, clutch, a million other things!!