Over the past couple weeks the rear brakes have begun making a popping sound (clunk) when braking to a stop. I don't notice it at speed, just when I cam slowing to stop.
I can also feel the pedal pulsing slightly in connection with the popping.
Pulled the drums off the other day, and nothing looked out of sorts.
No broken or cracked shoes, or drums.
Any suggestions?

92 fullsize with 4.56 gears eaton limited slip, stock rear drums and relatively new shoes.
Stops good, just sounds bad, and feels a little concerning under my foot.

Thanks in advance