I think that without a trunk they're all 13 feet, bumper to bumper. Three stock Model As will fit into a 40 foot shipping container with a few inches to spare.
The 30 T/S and the 31 S/W are both about 152 ¾ inches (+/- ¼"). The '28/29 is about 3 inches longer than the other two due to bumpers and braces according to our notes.
Thanks guys . The reason i asked, we got two down on the road and are trying to figure if they will fit on a 24ft trailer. Hopefully they will with a little overhang!!!!