I hate to split hairs here, but...
You mention the Rancho AAL adding 2" of height to the back. Is this in addition to the 1" or 1.5" or 2" you gained with the SLR shackle?
Or maybe your AAL compensated for some flattening of your second leaf set & both the AAL and shackle give you 2" above stock height?
So, I'm wondering what the Rancho AAL w/out the SLR shackle would do to the back end height (i.e. raise it .5"? 1"? 1.5"?).
Not trying to be a PITA here, just wondrin'.