Need new suspension
The torsion bars are firm feel 1.06:
http://firmfeel.com/a_body_mopar_torsion_bars.html
Sway bars are the Hotchkis 67-72 style. This is with a stock 1970 k-frame:
http://www.summitracing.com/parts/hss-22385/overview/year/1970/make/plymouth/model/duster
This is how the bar mounts to the chassis in the back. I'd consider this to be similar but not the same as the hellwig bar. I think the mount is stronger.
I also have the Hotchkis subframe connectors.
The torsion bars are firm feel 1.06:
http://firmfeel.com/a_body_mopar_torsion_bars.html
Sway bars are the Hotchkis 67-72 style. This is with a stock 1970 k-frame:
http://www.summitracing.com/parts/hss-22385/overview/year/1970/make/plymouth/model/duster
This is how the bar mounts to the chassis in the back. I'd consider this to be similar but not the same as the hellwig bar. I think the mount is stronger.
I also have the Hotchkis subframe connectors.