You are taking out the BB and just running the springs alone I'm assuming right?
Either way, when you're lowering the axle make sure to always keep an eye on those brake lines! Don't ever let them become what's limiting your axle from drooping out further.
So... with that said... Of the top of my head...
Have you disconnected the sway bar links? I've got a TJ so I'm a little different and I can't imagine this being a cause but if you've got the sway bar links off and the shocks are off the only other limiting factor I would think is going to be your steering linkage or driveshaft. I would lean towards steering being your next limiting issue and if the drive shaft is a slipyoke style it would come apart rather then limit you... I'm not sure what stock is on those.
Anyways, just tossing out a couple things to look at as possibly keeping it from dropping out.
Are you using a strut spring compressor? I doubt you can fit in a spring that large without compressing it. It was damn tough to fit in a 2" puck above the springs without a compressor on my TJ. When I added the XJ coils I had to get a compressor.
Already did rent them gotta do the rear tomorrow before it gets too hot. Fronts are done now will take pics of everything tomorrow.
I'm on stock control arms and have a good amount of room left. Also took it for a test drive tonight on the freeway (to check for DW) and everything was kosher, so I am happy about the outcome as of now.
Yeah, it's too hot now to work on stuff much. I always just keep my garage door shur about 75% of the way and turn on a few fans, but boy oh boy, its gettin' warm. Wont be doing much heavy work on the wag for a while.