My dad took it to his work today and touched the bushing with a DA and some 80 grit paper, finished it off with 320 grit, he also laid a straight edge on the clutch and made sure it was flush.
i have a question though, because the aluminum pulley is thicker than the steel with the aluminum pulley slid on i had maybe 1/8” of water pump shaft sticking out, this should be enough for the bushing to contact right? After all it only centers the fan clutch. I spun the pulley and fan after i tightened it up and everything looks straight and no wobble. I should be able to start it tomorrow and really get a eye on it