Here are a few pictures that show the Unity spotlight installed in my '57. The light was supposedly installed by the dealer when the truck was new. It was missing when I bought the truck but I found a NOS replacement that installed through the existing holes. Note that it is not installed through the A pillar but is installed above it through the roof. I have seen other TF trucks with spotlights installed in this location.

Matt

http://s844.photobucket.com/user/ma...2291_zps08f526fc.jpg.html?sort=3&o=2