The longevity part of the equation should be taken care of by an approval sticker found either on the crank pulley or a lose one to be applied by user in the engine bay.
The sticker indicates that the pulley has passed testing and is rated to be used on the motor it is to be installed on.
Can't really crawl under the truck right now to see what it says. But if I remember right it should be SFI Approved?
Lars
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