No problem BlueGill but for the other poster, my CL10V3-2 measures exactly 13'-8" which is exactly what Challenger lists for that lift. As noted above, you will need an additional 4" or so to stand the column up and don't forget that with a top cross bar, you will need the room to place the bar up and over the column to be able to bolt it in place. That should take 4" to 6" to be on the safe side so if you have 12'-2" of clear height, you should be good to go.
Bluegill, if you have 14'-6" of ceiling height and plan on lifting a lot of trucks, consider what I did and add a 2' extension on your lift. I have F-250 and F-350 diesels on mine and for a few buddies that work with ladders and have a ladder carrier on top, we would have to unload the rack without that extension. It also comes in handy lifting one with a camper as well as a plumber I know that has to have 2' of **** on the top of his van.