If you are keeping the stock sway bar the best thing to do is to measure the existing link and then go to somewhere like PepBoys and buy ones 1.5" shorter. They sell the straight links with urethane bushings. Just make sure you replace them with the car on ramps - don't do it with each wheel up on jack stands, as you'll likely bend the link when you let it down. Buy the ones with with 3/8" bolts and just drill out the existing holes in the sway bar (I think they are 1/4"). Alternatively you can go to Addco (the sway bar maker) and buy their links for a 1.5" lowered car. All the aftermarket links (for the rear) are now straight rods versus the stock ones, with swivel joints.