I believe the door mounted tail light assembly was the same until 56, the last year for it, the 57-59's have a special license light and plate holder that replaced it [and used the same cover and glass as the 39 car ]
"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