[rnrdthefox]

Next up I wanted to add and third brake light. I really wanted to add it the cab roof, but only could find an aftermarket version that was body-worked into the sheet metal. It was low profile (depth wise) but would still require me to cut into the inner roof and I didn't want to do that. So, I took the advice from others and put it just below the belt line.

This is from the trunk of a Chevy Impala. It has almost the right curvature of the truck cab and it can be modified to work. Also, the size seemed to be about right. I cut the whole thing out of the donor trunk. It has a LED board, inner diffuser, and outer lens. I put the outer lens on the bench and reduced the curvature with a heat gun. The donor metal tacked in well and conformed to the truck. Still needs final welding and to tabs for holding it in place inside the cab. I was pleased with how it turned out so far and should be watertight.