I'm finally finished installing the master cylinder and wheel cylinders. I decided to go with the Chevy 1 ton rebuilt MC so I could get a dual circuit going. I hope this turns out to be a good decision. we'll see when it comes time to test it out. as you can see, I drilled holes in the frame so I could plumb the lines through.
I had to drill some new holes in the running board arm because the original holes don't match up. 
I plumbed the brake light switch into the line. It's always good to let people know you are stopping.
I added two residual pressure valves (Magenta) to keep a little pressure on the shoes so I don't have to keep pumping the pedal. I also installed an adjustable proportioning valve (Bottom). this will keep the back tires from locking up on me when I brake.
tada!
I also had a chance to put in a new pinion seal. It was a pain in the rear getting the old one out. I had to bend and brake it to get a hold of it with a puller and then I finally got it out. 
a friend of mine at work let me borrow his puller and another friend let me borrow these washers to help push the new seal in the dif housing. I'm excited that it's all coming together. 