as an AutoBody tech for many years,,, we had a plastic comb, that was used for this. It was faster, and did 8-10 fins per stroke,, But still not a fun job. try to go to fast, and slip,, and it's 8-10 cuts in one fell swoop.
100%,, IF, after your done, swapping out tips,,you have the pop pressure's set to 2200psi. For this you either build your own pop tester,, or take them to a local diesel shop, and have them do it. The springs inside are sure to be worn some,, and weakened over time, so they will add a few...
http://www.thetruckstop.us/forum/showthread.php?35349-Fan-Clutch-replacement-Mod
Hey Tom,,,, this thread has all you need,, I did it to the burban.
Green truck has same fan blade, and HD clutch.