Yes it was a solid panel. It looks like the listing for the headliner board is correct. Do you have all of the trim and clips?

I wouldn't re-use that black factory deadener/insulation stuff. It's old & crispy. Near death.
Instead I'd put something like FatMat or DynaMat up there. Lots of other brands.
Run 3 strips about 8'-10" wide, evenly spaced,across the roof, side-side. Door opening-door opening.
Do this in front of that brace.
3 strips because odd numbered strips will cancel out any resonances. You could do 5 or 7 if you wanted. But they should be spaced the same distance apart as the width of the strips.
Going across the longest distance of the roof panel is like when you put your hand across a guitar's strings in order to stop them from...resonating!
So in behind that brace, once again running across the length, the strips would be running front-back. Different direction than the front.
A full covering of the deadener could be laid over top of all that too, but that's up to the customer & it's really not needed unless there's a higher end audio system being installed.
This is probably clear as mud. Lol!

Pix! I have pix!
Front-to-back. Because across the length.



Full cover.

That grate, I’m not to sure what’s in the car I haven’t seen it yet I just wanted to know if I could get a headliner before I took the job on
Thanks for the help



Thanks for the advice I will definitely look in to it if I get the job