I haven't decided on torsion bars YET, so I still have that open. I'm thinking maybe the stock 340 bars. It's a slant 6 car, so that "will" be an upgrade.
heck yeah. big block bars would be another option and if you were thinking of dipping your toe into aftermarket sizing, 920's wouldn't be out of control.
these cars were woefully undersprung from the factory, so bumping up several sizes isn't out of hand.