I live in a house that was build with 2 X 4 X 8, that measure 2" X 4" X 8'. An eight foot sheet of anything doesn't go from floor to ceiling, there is a 4 7/8" gap either top or bottom, or split the difference. Don't try to add a modern 2 X 4 in the wall to do repairs. Nothing lines up. I have to rip a 2 X 6 down to 2 X 4.
"gene"