Big Block Torsion Bar Selection

I have 1.12" bars in my Duster with a 340 that has an aluminum intake, headers, manual steering, and no A/C. So its pretty light as far as '74 Dusters go. I run Bilstein RCD's, and think it rides and handles great. Ride is pretty similar to a modern car, pretty comparable to my g/f's 2013 Mustang with the "premium" package suspension. I would suggest going with a good set of shocks, otherwise your ride is going to end up being harsh. Bilstein RCD's or the Fox shocks from Hotchkis would be my recommendation.