Hello, I'm replacing one of the rear frame rails on my 79 T/A. The old rail is cut off already, so I can't measure the width between the 2 frame rails. The body service manual says it should be 47 1/8", outside end to outside end, but that seems too wide. Would anyone be able to measure the distance between their 2 rear frame rails, end to end, and let me know what it is? I already found another error in the factory body manual, so I really want to know what someone else's dimensions are before I weld the new trunk floor in place. Thanks!