Before diving into the rear brakes I decided to install the master cylinder.  First the power brake booster.   I could not find a new boot for the booster so I sort-of-fixed the old one with electrical tape.  That worked just about as well as you might expect.

Getting the pedal linkage hooked up was a huge pain because there is no room to work.  But it went together.  I also hooked up the vacuum line from the intake manifold.

Time to bleed the master cylinder.  The rebuilt cylinder came with plugs for this.

I am going with silicone brake fluid.  My first time using it.

To bleed operate the piston until bubbles stop coming out.  I could feel the piston get hard as the air was worked out.

Master installed.  I left the plugs in until the brake lines in back are finished.