Eds Dart said

upper control arms will help. again though the poly front strut bushings and poly upper control arm bushings tighened the front so much even with no torsion bar in it took a floor jack to move the front suspension. i think your problem still is in the rear. you are going fast enough to need to control the violent launch. the front end is important too, your going the right way so keep it up, you will get there. mopar s/s springs and a good front end work well at the et you are running.

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