fvck it, I'll give you my opinion which is: I've always been leary of lightweight/underdrive pulleys, like most, I've heard the horror stories. I was on the fence about getting a stock sized lightweight pulley when I read and saw the post/pics Sam from GTM supplied with f'd up lightweight pulley on the car they were going stage II s/c. For me, that sealed the deal where I just can't justify potential risk, even if it tursn out to be a small one, for the whole 3-4whp you pick up from installing one of these. I'd go lightweight flywheel instead to free up hp instead.
If you are hell bent on it, I'd go to a reputable shop to get it done unless you are very confident in your skills.
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