Thicker bars need less clocking as they flex/torsion less.

I have 1" bars on my A-body for daily driving.
Hellwig front swaybar.
7-leaf springpacks in the rear to support 2 steel propane tanks in the trunk.
1-way adjustable shocks (Hotchkis @ front, QA1 at the rear wheels) can fine tune the setup greatly.

It handles way better, safer and more like a modern car.

I would upgrade my Dart to 1.06" or 1.10" without hesitation if it weren't for the costs of shipping 2 bars of steel overhere.
I'm off the opinion that 1" bars should have come stock on these cars.
B-body's, at the very minimum, too.