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I don't think the Advance Trac stability control comes into play on our trucks until 2010. Your best bet for a mild level is probably a new set of coils. On my last truck I used the 2" coils from Maxtrac and had no problem getting the alignment right. YMMV.I don't remember if 05s had stability control or not.. but none of the lift spindles play well with that system iirc.
Besides that, spindles usually come in 3" or 4". Your lift shackles are probably 1"... mabey 2".. You'd have a bit of a squat most likely.