Traction Bars For Pickups

[andyh1956]

I am going to need some kinda traction aid for a 2wd pickup. being that trucks are spring over traction enhancing becomes more of a challenge than a spring under setup.
I came across this setup on the web & it looks well thought out from a street ride point of use. However it of course is configured for a spring under setup. If this photo was flipped spring over I can't see anything that would stop it from working. In the photo as the axle tube rotates CCW under acceleration the bar is pushed forward which rotates the bracketry CCW imparting pressure to the top of the spring w/ the roller.
Reversed it should still do the same thing as the bar would be PULLED to the rear & push roller to the spring. However I'm sure the spring hangers are gonna have something to say about using this setup as drawn...
Anybody here have any kinda traction aids on their trucks using a spring over configuration?
thanks