Yeah the rear is freaking intense. Its roughly the same size as the bar on my dads full size truck... You will need to re-enforce those lower control arms if you don't want them snapping in two especially with those "soft" springs you have. Even the Ford Racing springs aren't really firm enough for that kinda bar.
Edit: And even then you will be lifting inside tires like a madman in the turns.
ok i have an svt so i would be ok with the lca's right? also what springs would u guys recomend if i wanted to go with the same bars? i have agx's on my car now, with stock svt springs, and stock sway bars. wanting to step up to the steeda bar in the back, wahts the best front bar to run with it?