Hi guys, I was wondering if anyone out there knows what the depth is between the front door window glass (rolled down) and the surface (outside) of the interior door panel down low where a speaker would mount in the metal cutout area? I ask because my car is currently not here and I'm trying to research some stereo speakers to fit in the doors. Yes, I hate the idea of cutting into the door panels, but I don't really like the kick panel/speaker combos that are available. I'm open to any other ideas you may have. The car is a 1970, Buick GS 455 coupe. Thanks in advance!