Brake issue 59 2ton

[Softpatch]

I'm having problems with my rear brakes on my 1959 Viking 60
after I drive the truck for a while the rear drums start to drag.

There were all new parts Hydrovac,( vacume asst)
Master cylinder( single)
New Lines,Shoe's, Springs, Wheel cylinder's (2 per side)
at first I adjusted them so they had a slight drag on both rear wheels
and they would lock up after a while
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I backed off the shoe's so I would have no drag still if I drive for a few miles
they would get hot like there dragging.

When I removed the drums and pump the brakes the cylinders move as should
Removed wheel cylinder took them apart and they look clear.
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It's all stock and has the parking brake drum type is on back of transmission
not on rear Wheel's
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I've bled the brakes starting at hydovac then wheel cylinder's
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I'm stumped.......?
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Here's some picture when I first put the brakes together
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Took these Today
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Driver Side
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Pass Side
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