I'd figure the variation is because burb and panel bodies are subject to 'wracking' that the pickup cab isn't .... so the holes were in the common piece, used or not for different models
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
