Crew Cab Headliner Question

[crewcabsquared]

I have a 86 K30 crew. It currently has the inner steel panels screwed and spot welded to the roof in place of a headliner board. I have all the moldings and a board to put in a fabric headliner, and would really like to.

Questions:
1. Can I remove the steel liners and install the board/moldings, or am I going to screw up the roof braces? I have spotweld drillbits and all. I would like to go this route so I can attach some fatmat or dynamat to the roof underside to help with insulation.

2. If not has anyone adhered the headliner material straight to the metal panels and installed the moldings? I have the headliner material and adhesive and plenty of experience installing h-liners.

Thanks in advance for any input!