Yup, as Woog said, I've got a prototype front bar on my '61 Suburban. This bar was custom designed for our '60-'62 Chevy and GMC torsion bar front suspensions.
This fits with the tight turning radius of our trucks, and full suspension travel.
It requires no welding, just four holes drilled in the frame for the saddle mounts.
I'm working for the money right now to get a batch ordered.
-Brad