I have the Unity fog lights on my '57, and I'm guessing that the dealers would have installed the Guide version.

Mine mount a little different from what Bill posted. I attached a couple of pictures so that you can see what they look like. Not everyone likes the look on a TF truck, but I do.

The only negative is that I have to be careful when working under my hood. The bulbs are held in place with spring clips, and if I forget and lean my leg against them when reaching under the hood, the bulbs pop loose from the springs, so I have to remove the mounting ring and reseat the bulbs.

http://s844.photobucket.com/user/ma...2291_zps08f526fc.jpg.html?sort=3&o=0

Matt