Thermal clutch noise

Pop the belt off and rev it into the vibration zone.This will divorce engine vibes from fan vibes. Obviously, don't drive it like this.
Your stock teener doesn't need much of a fan to keep it's kool. If you are not towing, not running A/C,not living in a desert, and not racing; then the 4-blade slanty fan will do, or the small dimeter 6-blade,273 fan. You could even run one of those aluminum 6-blade small diameter flex fans,that nobody likes. Or a straight viscous coupling, without a thermo valve.
But, if you plan on running the A/C, in 100*days, stuck in traffic,well, that just won't do.