[SVTADAM]

Id check the anti sway bar end links. Take them off and look for excessive wear. Since you recently installed anti roll bars, i would also check the mounts to see if they are loose, or if the bar traveled.

While you have the car jacked up, check the ball joints and tie rod ends. If you dont know how to do that, grab the wheel at the 12 o'clock and 6 o'clock and try wiggling it back and forth. If you have excessive play, then you probably need new ball joints. If you grab the wheel at the 9 o'clock and 3 o'clock positions, and you have play, then you could have bad tie rod ends.

Re-inspect the power flex bushings. Make sure all bolts are torqued to spec.

Hopefully you will find the problem. Good luck.