No not yet it is a a/c car and with the intake and headers weight is not the issue. I'm stepping up to a even bigger bar than available to stiffen the front. I haven't yet but future plans to mount front and rear sway bars off of a Chevy Trailblazer (front is tubular and vehicle weight is about the same). I am setting that car up more for pro touring/handling rather than a strip type that I already have 2 to handle that.
It turns out that as far as torsion bars are concerned bigger really is better, especially when you're talking cornering/handling ability. So, I'm going to be keen to hear how it affects the car. Be careful with the sway bars and whatever you do, leave the rear one off until you have the front one in and see how it affects the handling. Under NO circumstances should the rear bar be bigger than the front. It's even a little dicey if they are both the same size.