I wanted to start this post discussing driveline angles so I can have a better understanding of them. I know you can measure the angles and determine if they are reasonable or not, but I would like to understand how changes to the driveline effect the angles themselves. Right now, I'm running a 2 1/2" ORD shackle flip on stock '90 K5 springs and a 14B/FF. My T-case is dropped using the factory spacers (1" maybe?) and my angles are off by 1'. My research suggests that 1' off is as perfect as you can get. So, If I raise the t-case back up, how much will this affect my angles? It would seem that because the t-case is being raised and lowered in parallel, that the angles wouldn't change much in respect to each other. In other words, if my angles right now are 6' and 7', it would seem that raising the t-case would make the angles steeper, but shouldn't they change the same amount with respect to each other? Or, if my angles are good right now with the t-case dropped 1", can I raise the t-case back up, add 1" add-a-leafs, and expect the angles to stay exactly the same? If not, how can I go about determining what degree shim to use? Will the degree shim needed change if I use a 1" add-a-leaf that is tapered? Thanks for any input on this, Thomas.