Installed new pads and shoes about 3 weeks ago and when I first started driving it, it seemed to be hard to get going, like the brakes were draging. So I loosened the rear shoes and drove another week or so and even now, everytime I have come to a stop, when i try to get going again, it needs a lot of power to start rolling, then when I have gone about a 100-200 yards, I hear this droaning noise and finally it is loose again, till the next stop. If my shoes are set right, could it be my master cylinder?
The front brake calipers colapsed easily when I installed new pads.

Installed new pads and shoes about 3 weeks ago and when I first started driving it, it seemed to be hard to get going, like the brakes were draging. So I loosened the rear shoes and drove another week or so and even now, everytime I have come to a stop, when i try to get going again, it needs a lot of power to start rolling, then when I have gone about a 100-200 yards, I hear this droaning noise and finally it is loose again, till the next stop. If my shoes are set right, could it be my master cylinder?
The front brake calipers colapsed easily when I installed new pads.
Sounds like the rear are put together wrong. Remove the drum and hand actuate the little adjuster lever. It should ratchet the adjuster to make the shoes tighter. Accidental reversing of the adjuster screws can be confirmed this way. I'd also check to see that the wheel cylinder pins are properly located in the shoes.

Also, a master cylinder cannot cause this. A bad booster or misadjusted booster pushrod can cause this.

Here's what I'd do.
Park the truck, chock a wheel.
1. With P-brake released, pull parking brake cables at junction on driver's side. (pull single down)
Take note of noise from each wheel and amount of movement.
2. Set parking brake and repeat.
There should be no movement if the shoes are set right when the P-brake is applied.

Sounds like the rear are put together wrong. Remove the drum and hand actuate the little adjuster lever. It should ratchet the adjuster to make the shoes tighter. Accidental reversing of the adjuster screws can be confirmed this way. I'd also check to see that the wheel cylinder pins are properly located in the shoes.

Also, a master cylinder cannot cause this. A bad booster or misadjusted booster pushrod can cause this.

Here's what I'd do.
Park the truck, chock a wheel.
1. With P-brake released, pull parking brake cables at junction on driver's side. (pull single down)
Take note of noise from each wheel and amount of movement.
2. Set parking brake and repeat.
There should be no movement if the shoes are set right when the P-brake is applied.
Thanks man. Obviously you mean that I should run the vehicle in drive after I chock the wheels, yes?

Truck stationary, engine off. Pulling each cable by hand with the brake off will result in the lever at the shoe assy actuating. You will hear the movement. Then apply the P-brake. Pull the cables and there should be no movement or sound.