Welcome to the site! It looks like it is probably a 2-ton. The dust caps on the front wheel bearings look like they bolt on, and I believe they did not do that on anything lighter than a 2-ton.
That looks like it is in pretty good shape!


Mike
1955 Chevy 6400 ex-flatbed (no bed now!) sold September 2023
In the Stovebolt Gallery
1958 Chevy 6400 flatbed W/dump
In the Stovebolt Gallery
1959 Chevy Suburban Owned for almost 20 years, Daily Driver -- sold May 2016
In the Stovebolt Gallery

Sufficient unto the day is the evil thereof