With the beginning of the AD/ND GM Cabs, I've noticed three different configurations for light placement. Two lights, with them placed on the far corners, Three lights with one in the middle, & the two corner lights moved closer towards the middle, & 5 lights, with two in the far corners, and three bunched in the middle. Most of the 30s, & early 40s trucks I've come in contact with had the three lamp cluster bars installed on them, above the windshield, with the round lights, with coned lens.
