I love the 1 3/8" kit. I had to do a little noching of the metal right above the bar that hangs down from the frame rails. It was fine to start with but once things settled back down the bar was hitting it and making all kinds of annoyin noises and giving me a headache. After busting out the sawzall and doing some clearancing it is great. It goes down the hgihway beautifully. Around town it isn't much rougher feeling than it was with the eibach's and Bilstein's with the stock bars. the only time you really notice is on a steep driveway you have to drive up at an angle, it'll pick up a rear wheel (at least mine does with JL's subframe connectors and braces). It corners very flat, it is a lot of fun. And auto crosses are a blast now for sure. Not that they weren't before.
Former owner of 94 Bird with DOHC 4.6L swapped from a mark VIII
2011 CTS-V Wagon
1968 Torino was an original 289, C4, fully documented numbers matching car. Now: DOHC 4.6L/T-56 swapped, Cobra intake, IMRC delete, BBK long tubes and H pipe. Dynotech Aluminum Driveshaft, 9" rear with TrueTrac and 4.11's.