help with headliner replacement

[piece]

have an 87 t type going to try and replace the headliner myself(astro roof car)do the rear qtr glass panels have to come out all the way?and how does the seatbelt retainer come off(looks like it just pops off from top or bottum?)? just trying to prevent breakage of any hard to get parts. thanks in anvance jim

 

[Paul Clark]

Quarter glass is fine. Don't remove.
The seatbelt retainers pop off.
You'll need a (45?) torx head socket for the seatbelt bolts.