Torsion bars for better handling; your experience?

I have PST 1.03 bars, Bilstein RCD shocks all around and Mancini heavy duty leaf springs with 1" lowering blocks, the front is lowered too. 1970 340 Dart. I don't do much high speed cornering but the Dart handles great. Next on the list will be a Borgeson or Firm Feel steering box and bigger sway bar. It's night and day compared to stock.