Josh, I've heard the same thing you have about not using it. So when I replaced the clutches in mine, I didnt add any modifier at all (didn't want to smell that crap either)
I have no chatter whatsoever and its holding up fine with about 15-20k on it since then.
Another thing. Try to get to a junkyard and get the trac-lock S-spring out of a F150 rearend. They are stronger than what you've got now.
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NMRA O/C 9516
NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft
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