70 challenger. ladder bar/coil over car with front shocks on 90/10 setting. Strange double adjustables in back. Extension set at max, rebound set in the middle. Big Block torsion bars. 35 psi air pressure in radial tires. Stock suspension. Car hooks nice and straight but gets unstable at high speed. Ran 129 mph twice last night but it was all I could do to finish the run. I had to lift on a 3rd run because it started getting sideways. My front end is aligned but it is mechanically limited on caster degrees and is set at around zero. I'm not sure if the shocks are keeping the front end nosed up unloading the tires or more positive caster will fix the issue. Any suggestions? Also, what front shocks and settings are usually good with a ladder bar car?