Finally got the right side trimmed to the point where I could drill the hing line for the firewall hinge on the right side. Will try to get the left firewall hinge tomorrow.
My right angle drilling tool with a very long extension made drilling the hinge starting holes from the inside a bit easier. The flexible LED pen light was also very handy. I could press the LED to the backside of the hinge and see a fairly straight shot through the fiberglass into the hole in the hing. I didn't have to worry about the drill bit damaging the LED since it just pushed the flexible head out of the way when the bit came through.
Have I mentioned how much I hate fiberglass?
Flex head LED light and right angle drill attachment.