Torsion bars

I am replacing my T-Bars with "Heavier duty" ones. Rancho makes their own T-Bars and of course I can always go with factory ones from a 2500HD, or 3500 truck. I have the light duty ones right now, but with my lift and 37's, it's pushing their limits. Anyone out there replaced their's or used the Rancho's?

I have a 1500 and used the 2500hd torison bars they didn't work thre front end still kept droping so I went with swayaway and I love them haven't had 1 prolbem.

I knew Rancho made T-bars for the older body style trucks, but do they make them for the 99-present trucks, or do the old ones fit?
Jeb

also, which swayaway bars did you use? Their website doesn't list any replacements for a full-size chevy.