Welcome to the Bolt and as Leo says its nice to have another Panel man on board.
You may want to cut the little access doors out as they are available and then you can spray the back side of the bolts with penetrating oil and let them soak.
You may want to weld a washer to them so you can get a grip on them and twist them out?!
I can tell you right now, even with those little plates off you do not have a lot of room to work and get to the inside. I just put some sound deadener in my doors and man was it a pain.....if you do this don't go side to side.....put it top to bottom. It always takes one way to figure another is best.

Good luck on the screws and as Leo says, post in the correct forum and you will get more responses.


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile