What diameter torsion bars?

I have .870 torsion bars on my 73 Swinger (340, P/S). I also have SS rear springs and new KYB gas shocks. The ride is not soft but it was leaning to much during cornering.

I installed a Helwig front tubular sway bar which improved the handling greatly. I didn't see a need for a rear sway bar with the leaf spring suspension. I guess if you just want a stiff ride all the time go with larger torsion bars. if you just want it to handle better during cornering a sway bar will do the trick.

Last, the Helwig set up was easy to install and fits perfect.....I read a lot of bad reviews about Adco, cheaper though.