Coil Over vs Torsion Bar

way back when one of the A body uni body advertisements had a dart running down road with no right front tire, ballast in trunk to balance it, to show how stiff the uni body design was!! in early 90s i had a stock duster spent its hole life on drag strip being launched with a 4 speed, i could jack ether front tire a foot off the ground by the bumper and other front tire never come up, woulda jacked it higher just to see but was scared windshield was gonna crack or pop out!! i believe harsh duty will take its toll on stock uni body if something isn't done to help it...something to thunk bout! DWB