Hello, can anyone tell me how to remove the rear brake shoes/pads from a 1940 Master Deluxe? See pictures of my brakes. I am replacing the brake lines, wheel cylinders, brake shoes, and springs, but can't figure out how to get the brake shoes/pads off. Please help

Brakes Pic1
Brakes Pic2
Brake Pic3
Brake Pic4


1946 Chevy Truck Export Blue with Black Trim