When you order the Addco, you have to specify whether you want Urethane or standard rubber bushings. Neither the Urethane nor the rubber bushings squeak. And as Chris mentioned, you will not be able to use factory brackets.
Try not to mix and match sway bars, unless you know you want a specific amount of torsional stiffness from a specific bar. When you get to that point, you won't be asking questions about sway bars.
Try not to mix and match sway bars, unless you know you want a specific amount of torsional stiffness from a specific bar. When you get to that point, you won't be asking questions about sway bars.