Doing this right now actually, hopefully finishing today...
Since you got one side done, and it's 1" higher, or more if still jacked, it's possible the delta between the two sides has made for some binding. If you haven't already done so, raise and lower the two sides to see if it frees-up. Lightly tap upward on the end of what should be a pointy bolt. I imagine you did this on level ground, and if not, that too can introduce such dynamics...
I have a winch control box in that spot on the passenger side that I might have to move, but it's plenty free, like the driver side that came-out with ease.
I'm having a hard time removing the A-pillar plate attached to the frame perch with two bolts (14mm heads/15mm nuts). Cordless impact not cutting it, so I'll go air in a bit. It seems that many or all BL kits don't remove the factory rubber, so this might not be something the OP will need to do...