I took the master cylinder off and bled it on the vise. The rear worked as it should and pushed a strong stream of fluid when I held it out of the chamber while pushing. The front didn't do any thing, no bubbles or fluid.

'65 C-10, 65 L-60, 65 C-80, 72 C-60 & and a bunch of old Chevy cars.
Never time to do it right, always time to do it over.