P 30 master cylinder bench bleed and install

Chevrolet's 1992  P model service manual has the master cylinder bench bleeding procedure using plugs on the ports. Position the master with the front slightly down, push the piston with short 1 inch strokes until resistance and no bubbles. Then reposition  with the front slightly up and push the piston until no bubbles. I made a contraption that fits in a vise to do this.

 Master installed