I'm running EVO LA / COs with OE rear sway bar. No issues.
As mentioned, OE sway bar is more than adequate and won't limit flex the way an Antirock will. :yup:
Move your reservoirs to the inside of the frame rail.
I remember a post where Eddie mounted the rear reservoirs and the inboard side of the frame on Jet Li, but I'll be darned if I can find it.