I ordered the same kit for my '51 sedan. The big ones go across the top of the grille at the front. I don't know about trucks, but they may just be sending the same kit out to all body styles and models of certain years.
Those accustomed to the finest...find it in Chevrolet.
1951 2dr Deluxe Sedan
1950 Deluxe Convertible
2008 GMC SLT 4X4