I'm also a member of the ATHS, Antique Truck Historical Society, and some folks have some great photos of trucking back in the good old days, not sure this is one of the "high points", tho!!!
I have a "tow vehicles" category on my blog: http://racecarstuff.com/?cat=16 Here are a couple from it: More: http://www.parkerchassis.com/shop/Foolbus.htm and more: http://www.entropyracing.net/asp/Photos.asp?Select=4 and Big Momma: More: http://stuart5.com/bigmomma.html
This one used to be Bobby Allison's from 72-76. It has been repainted several times. This picture is from 2004.
i saw this "hauler" in Brisbane Australia at the National Mustang Concours this year. On the back is Allan Moffats original Trans Am.