what size torsion bars should I buy?

PST 1.03 with a small block here, and love em.
Car stays a lot flatter in the corners, and driveway dips and bumps are not a problem any longer.
The only real way I might be able to explain the 1.03 bars is if I push down on one fender with both hands and putting most of my weight on it the fender dips about 1-1.5 inch.