This is a great photo, it actually appeared in the Hemmings blog about 4 months ago. I don't go back to the Apollo days but I have worked at KSC for several years. I'm certain that the M26A1 and the blue dolly are not connected to the Saturn V 1st stage in any way at the moment this picture was taken. What is happening during this lifting operation is very similar to how the Space Shuttle is moved from it's horizontal position to vertical. The top of the Saturn V section is being supported by the 250 ton bridge crane which is 400 feet above the floor and cannot be seen in this photo (only the hook is visible). The 175 ton crane seen at the top of the image is attached to the bottom of the Saturn V segment, but due to the angle of the photo none of this rigging can be seen. NASA used the M26A1 Dragon Wagons as prime movers for the Saturn V 1st stages. It appears that they had more than one M26. These trucks are long gone from the area, and I don't know what became of them. I do know of at least 6 M26A1's that ended up within about 25 miles of the Kennedy Space Center, but most are also long gone now. I don't know if any of these were former NASA trucks. Attached is a pic of an M26A1 prime mover towing a Saturn V 1st stage.