I should have been more clear . The front drums are held on by the studs and possibly a rivet ore two onto the hub.
Looking at the photos yours appears to be a 1/2 ton as they appear to be 6 lug . The rears do not use the studs to hold it on. They should slide off toward you over the studs. May require a torch to get them to un bond them selves from the axle. Usually only the 3/4 ton tucks have a tapered retaining screw to hold the drums to the axle. The 1/2 tons do not.
I have as a last resort used a torch to go in the adjuster access hole on the backing plate and cut the adjuster shaft. It requires a little experience and caution but can be done. Pretty sure you will need new wheel cylinders anyway by the condition of the other parts.
Last edited by triplep; 04/27/2021 6:06 PM. Reason: Correction
