suspension physics majors???? step up

[crossy]

somone with waaay more knowledge than me please explain why i have been told that traction bars(slappers) are a waste of time on my 81. the rear is still mounted UNDER the leafs as it cam althought the truck is lowered about 5" in the back. I did come up with a way to make traction bars that will mount under the diff and drive up on the front leaf eye.

I just added 4* of negative pinion wedge because i came up with exactly 0* offset while at rest.
I had 4* positive on the pinion and 4* negative on the tranny. My pinion is now 0*. I understand that even the 4*I installed may not be enough. i can't afford any more trial and error. I lost(split) a $1000 trans from this truck on pass #13. thanx , crossy