just remove the screws from around the inside of the door and gently push it out the back and out from under the dash, may have to wiggle it a bit to get it free, but it IS 60 year old cardboard material, so it may not come out real easy OR in one piece. also, if you have a heater you may need to pull the heater to get a glovebox in or out
hope this helps and isn't confusing,
Indy
