Dangina -- the "twichyness" will be caused by the alignmemt... if not enough positive caster, then more twitchyness.... Toe out will also welcome it, but IMO... just adapt and re-learn the car's new steering. My steering is quickened, additionally, by a smaller diameter steering wheel (11.5" dia)... driving on the hwy or road courses are no problem.... very enjoyable!... I have no "twitchyness" whatsoever.... steering is very responsive (original never rebuilt T/A ps box, fast rati pitman arm, corrected longer length idler arm).
Another point to consider, is lower/wider profile tires ~50-45-40-35 having their wider/narrower contact patch, vs taller narrower profile tires ~55-60-65-70 having their narrower/longer contact patch. Latitude (cornering) improvemenmts benefit from wide/narrow patches (ie: auto-x/road racer tires), while longitudinal (accel/decel) improvements benefit from narrower/longer patches (ie: dragster rear tires). Steering with a narrower/longer contact patch (55-60-65-70 profiles) carry the car further straight; opposite with lower proflie tires.
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