What size torsion bars for a 383 in a 75 Dart?

If I was buying new bars I'd go with the 1". With that said we built our old '67 Barracuda fastback with a 383/727 AND AC AND PS using stock small block handling package stuff (.87 torsion bars, small block sway bar). While not a canyon carver it drove nice. Shocks were just the old Monroes I had pulled off the GTS because I didn't want to go buy shocks.