If it's a 16000lb. gvw truck, it's actually a 2 ton 6100, or 6400 series. Looking at the wheelbase in the picture, i'm going to guess 6100 series. Look at the ID plate in the driver door jamb, & see what the numbers are. This will tell you, what you have. Also looks to be a '51 model, with the pull down door handles, & vent glass. Get that ID plate no., & decifer it. That's the only sure way to find out. Good look'in truck. Thanks for the additional pictures.
