'75 Ranchero hydroboost upgrade

First to remove the actuation arm pivot pin.
This pin is welded in from the back side. Hence I ground off the weld and filed smooth thinking the pin would pop out. It would not. Took it to a metal shop where they heated the brake arm with the back side of the pin in a hydraulic press. "Pop" and out it came.

I believe I can clean up the pin and move to the new position - once I determine where that will be.