Drag race antiroll bar, and perhaps experiment with temporarily disconnecting the front sta-bar.
Rear LCA relocating brackets, and I think the best overall setting is where you don't get either squat or separation when you get into the throttle.
Good rear shocks, ideally adjustable for compression (bump) as well as for rebound, and a PHB.
What is happening is that the rear axle steers very slightly under both rear squat/lift and chassis roll from the engine torque reaction, so what you want to be doing is holding those movements down to small amounts. Shocks slow these motions down and keep the axle from overshooting its steering (and help keep you from over-correcting or losing the battle just trying to keep up). A PHB with firmer bushings will eliminate most of the lateral axle motion coming from the OE PHB bushings compressing and then rebounding slightly (from however much rear squat/lift remains after you do the other things).
Norm
