The front sway bar is already thick enough... go bigger and you'll be plowing off the side of the road. Get a thicker rear bar, get some lowering springs (easier said than done), some new shocks, replace old sway bar bushings front and rear, and some speed rated tires with stiff sidewalls and it should handle a lot nicer and shouldnt ride too hard.

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1985 CA 300D Turbo , 213K mi