I read here on your site the article:
Driveline Basics with Steve Johnson. After looking at my truck (1980 with 8" suspension lift) it appeares that my pinion angle might be more that Steve indicates is recommended (3deg)I don't wanna put any undue strain on the driveline .....he says shims are a possibility....
My question is is it possible to put slightly longer shackles at the front of the leaves and shorter ones at the rear of the leafs??? this would rotate the diff a bit I'm thinking.....

anyone tried this? what are the drawbacks or pontential problems????

Anyone?