Coil Over vs Torsion Bar

How would an updated torsion bar set up compare against that $30,000 mustang?

If by upgraded torsion bar setup you mean larger diameter torsion bars, reinforcing the k member, updated tierods,control arm mods etc.. It didn't. My car sat too high (mostly because of torsion bar and header clearance) , recirculating ball even with the firm feel option was no match for rack and pinion plus the major weight reduction over the front wheels affected my ability to stay with that Shelby when cornering.