Get the car as light as possible and ditch the t-bar front end and you'll be fine.
Pretty sure the fastest cars still have t-bars and leaf springs....
IRS or an invasive 3 link would add some improvement.
what car? Please don't say F1. There is a reason you don't see old Mopars at tracks all over but you do see GMs. Because the suspension on a Gen II F-body is way better than the Mopar. Can you make a t-bar work? sure but it will cost a ton. Show me one Mopar that competes (and wins) in NASA or like league. Ever been to a NASA, AER, Champ or even Lemons event? None of top teams run a t-bar set up. I love Mopars, but the T-bar isn't a good set up for road racing. One can make it better, but it will never be as good as a BMW or similar car. Last I looked the Hotchkis kit.. no brakes, no spindles, no rotors was close to $3800. If I wanted to do some road racing and be serious, I'd go with an aftermarket rack/coil over kit. way more adjustment.
