Bold move! looks very good
There is about 1 1/4" of space between the headliner and the crossmember.This is a great mod, my hat's off to you.
Off topic questions:
Is the headliner right up against the cross-members in the roof?
Are the crossmembers spaced evenly all the way back?
I want to run some rails up in there for an overhead console, but haven't had the time to get into it yet. If there is some clearance maybe the rails can be mounted between the headliner and crossmembers...