school me on anti-wrap bars...

having a trouble with axle wrap/hop was thinking about swaping out some leafs but i am overall happy with the ride/performance of my setup, just to much wrap.

bushings at all joints? leaf spring end and shackle the most common?

keep angle inline with DS?
how much spread between upper and lower bars?
just a few pointers would help.

search. it's been done and covered 1 million times. I'm feeling generous, so start here: http://www.naxja.org/forum/showthread.php?t=87177