55.2-59 1958 Apache 38 brakes dragging all around.

[dsraven]

does the truck do this all the time or just after it has been driven for a bit and the brakes have been warmed up?
take it for a spin to warm things up
jack up truck and block so all wheels are off the ground
check if the wheels spin easily or if the brakes are holding and check for any grinding noises etc, like a shoe is rubbing on the drum
if they are holding then first check the pedal to see if it is returned completely so the pedal arm rubber bumper is against the firewall. next check to ensure the master cylinder has some freeplay on the pushrod. there is a return spring down there that can get weak and the weight of the pedal can be enough to overcome the spring, especially if everything is gummed up under there. it's why i asked about the pedal returning fully
the bushing where the pedal arm goes through the floor can also be a tight spot if it is worn and has moved around some. this is especially bad when the cab mounts have become worn out or the body has rusted and crumbed where the cab mounts fit up. some body movement can cause the pedal arm to bind where it goes through the floor
step on the brake pedal a few times. you should have a nice firm pedal that is sitting at the normal height when the brakes are applied, like not too far down towards the floor. keep the pedal pushed for a minute and ensure the pedal doesn't slowly keep dropping towards the floor. you shouldn't hear any strange clunking noises when you do this and if you do it could be the backing plates are worn where the shoes have rubbed against them and the shoes now get stuck in the divot creaked. when the brakes are activated they force the shoes out of those grooves and this causes a clunk. it also makes brake adjustment impossible sometimes. release the brakes now and recheck to ensure you don't have a tight wheel. if the brakes are binding then first check to ensure the pedal is acftually all the way back at the top against the rubber bumper, if good then try loosening a bleeder screw to see if the system is holding pressure. remember that a drum brake system is supposed to hold a couple pounds pressure to keep the wheel cylinder cups pressed against the cylinders and sealed. worse case scenario take a front wheel and drum off and check to see what you have.
let us know what you find, since you have our curiousity going. some pics would be great.