I installed a ABS headliner in my 39 and was happy with the results. I would think the fiberglass would be similar to istall. Since it must be trimmed, measuring and fitting is very criticle, cut a little at a time. The process will involve putting it in and out numerous times to get the correct fit. Takes two people, one to hold it up and the other to mark it ect. Most important thing is to check twice cut once.
